Home / 1,171,448,589.36-1,616,594,618.61-642,821,421.90

Finding the Fourth Proportional to 1,171,448,589.36, 1,616,594,618.61 and 642,821,421.90

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Solution

The fourth proportional to 1,171,448,589.36, 1,616,594,618.61 and 642,821,421.90 is: 887,091,128.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171,448,589.36 : 1,616,594,618.61 = 642,821,421.90 : x
  2. Step 2: Convert to fraction form
    1,171,448,589.36/1,616,594,618.61 = 642,821,421.90/x
  3. Step 3: Cross multiply
    1,171,448,589.36x = 1,616,594,618.61 × 642,821,421.90
  4. Step 4: Simplify right side
    1,171,448,589.36x = 1,039,181,651,370,768,256
  5. Step 5: Solve for x
    x = 1,039,181,651,370,768,256/1,171,448,589.36
  6. Step 6: Final answer
    x = 887,091,128.72

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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.