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Finding the Fourth Proportional to 529,645.72, 730,902.48 and 287,934.40

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Solution

The fourth proportional to 529,645.72, 730,902.48 and 287,934.40 is: 397,344.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,645.72 : 730,902.48 = 287,934.40 : x
  2. Step 2: Convert to fraction form
    529,645.72/730,902.48 = 287,934.40/x
  3. Step 3: Cross multiply
    529,645.72x = 730,902.48 × 287,934.40
  4. Step 4: Simplify right side
    529,645.72x = 210,451,967,037.31
  5. Step 5: Solve for x
    x = 210,451,967,037.31/529,645.72
  6. Step 6: Final answer
    x = 397,344.79

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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.