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Finding the Fourth Proportional to 529,135.38, 730,220.01 and 287,417.88

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Solution

The fourth proportional to 529,135.38, 730,220.01 and 287,417.88 is: 396,643.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,135.38 : 730,220.01 = 287,417.88 : x
  2. Step 2: Convert to fraction form
    529,135.38/730,220.01 = 287,417.88/x
  3. Step 3: Cross multiply
    529,135.38x = 730,220.01 × 287,417.88
  4. Step 4: Simplify right side
    529,135.38x = 209,878,287,207.78
  5. Step 5: Solve for x
    x = 209,878,287,207.78/529,135.38
  6. Step 6: Final answer
    x = 396,643.84

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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.