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Finding the Fourth Proportional to 528,411.60, 791,264.16 and 291,490.92

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Solution

The fourth proportional to 528,411.60, 791,264.16 and 291,490.92 is: 436,489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,411.60 : 791,264.16 = 291,490.92 : x
  2. Step 2: Convert to fraction form
    528,411.60/791,264.16 = 291,490.92/x
  3. Step 3: Cross multiply
    528,411.60x = 791,264.16 × 291,490.92
  4. Step 4: Simplify right side
    528,411.60x = 230,646,317,961.43
  5. Step 5: Solve for x
    x = 230,646,317,961.43/528,411.60
  6. Step 6: Final answer
    x = 436,489.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.