Home / 1,171,448,589.86-1,616,594,619.30-642,821,422.40

Finding the Fourth Proportional to 1,171,448,589.86, 1,616,594,619.30 and 642,821,422.40

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Solution

The fourth proportional to 1,171,448,589.86, 1,616,594,619.30 and 642,821,422.40 is: 887,091,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171,448,589.86 : 1,616,594,619.30 = 642,821,422.40 : x
  2. Step 2: Convert to fraction form
    1,171,448,589.86/1,616,594,619.30 = 642,821,422.40/x
  3. Step 3: Cross multiply
    1,171,448,589.86x = 1,616,594,619.30 × 642,821,422.40
  4. Step 4: Simplify right side
    1,171,448,589.86x = 1,039,181,652,622,612,480
  5. Step 5: Solve for x
    x = 1,039,181,652,622,612,480/1,171,448,589.86
  6. Step 6: Final answer
    x = 887,091,129.41

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.