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Finding the Fourth Proportional to 529.78, 731.09 and 296.90

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Solution

The fourth proportional to 529.78, 731.09 and 296.90 is: 409.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.78 : 731.09 = 296.90 : x
  2. Step 2: Convert to fraction form
    529.78/731.09 = 296.90/x
  3. Step 3: Cross multiply
    529.78x = 731.09 × 296.90
  4. Step 4: Simplify right side
    529.78x = 217,056.22
  5. Step 5: Solve for x
    x = 217,056.22/529.78
  6. Step 6: Final answer
    x = 409.71

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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.