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Finding the Fourth Proportional to 529,134.36, 730,213.56 and 287,417.40

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Solution

The fourth proportional to 529,134.36, 730,213.56 and 287,417.40 is: 396,640.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,134.36 : 730,213.56 = 287,417.40 : x
  2. Step 2: Convert to fraction form
    529,134.36/730,213.56 = 287,417.40/x
  3. Step 3: Cross multiply
    529,134.36x = 730,213.56 × 287,417.40
  4. Step 4: Simplify right side
    529,134.36x = 209,876,082,859.94
  5. Step 5: Solve for x
    x = 209,876,082,859.94/529,134.36
  6. Step 6: Final answer
    x = 396,640.44

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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.