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Finding the Fourth Proportional to 529.60, 731.06 and 382.43

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Solution

The fourth proportional to 529.60, 731.06 and 382.43 is: 527.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.60 : 731.06 = 382.43 : x
  2. Step 2: Convert to fraction form
    529.60/731.06 = 382.43/x
  3. Step 3: Cross multiply
    529.60x = 731.06 × 382.43
  4. Step 4: Simplify right side
    529.60x = 279,579.28
  5. Step 5: Solve for x
    x = 279,579.28/529.60
  6. Step 6: Final answer
    x = 527.91

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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.