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Finding the Fourth Proportional to 498,841.08, 688,627.32 and 317,801.28

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Solution

The fourth proportional to 498,841.08, 688,627.32 and 317,801.28 is: 438,710.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,841.08 : 688,627.32 = 317,801.28 : x
  2. Step 2: Convert to fraction form
    498,841.08/688,627.32 = 317,801.28/x
  3. Step 3: Cross multiply
    498,841.08x = 688,627.32 × 317,801.28
  4. Step 4: Simplify right side
    498,841.08x = 218,846,643,738.97
  5. Step 5: Solve for x
    x = 218,846,643,738.97/498,841.08
  6. Step 6: Final answer
    x = 438,710.15

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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.