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Finding the Fourth Proportional to 640,069.62, 883,322.91 and 368,137.59

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Solution

The fourth proportional to 640,069.62, 883,322.91 and 368,137.59 is: 508,045.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,069.62 : 883,322.91 = 368,137.59 : x
  2. Step 2: Convert to fraction form
    640,069.62/883,322.91 = 368,137.59/x
  3. Step 3: Cross multiply
    640,069.62x = 883,322.91 × 368,137.59
  4. Step 4: Simplify right side
    640,069.62x = 325,184,367,279.19
  5. Step 5: Solve for x
    x = 325,184,367,279.19/640,069.62
  6. Step 6: Final answer
    x = 508,045.31

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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.