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Finding the Fourth Proportional to 529,387.21, 730,553.80 and 287,669.21

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Solution

The fourth proportional to 529,387.21, 730,553.80 and 287,669.21 is: 396,983.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,387.21 : 730,553.80 = 287,669.21 : x
  2. Step 2: Convert to fraction form
    529,387.21/730,553.80 = 287,669.21/x
  3. Step 3: Cross multiply
    529,387.21x = 730,553.80 × 287,669.21
  4. Step 4: Simplify right side
    529,387.21x = 210,157,832,876.13
  5. Step 5: Solve for x
    x = 210,157,832,876.13/529,387.21
  6. Step 6: Final answer
    x = 396,983.21

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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.