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Finding the Fourth Proportional to 529.17, 728.57 and 423.87

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Solution

The fourth proportional to 529.17, 728.57 and 423.87 is: 583.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.17 : 728.57 = 423.87 : x
  2. Step 2: Convert to fraction form
    529.17/728.57 = 423.87/x
  3. Step 3: Cross multiply
    529.17x = 728.57 × 423.87
  4. Step 4: Simplify right side
    529.17x = 308,819.58
  5. Step 5: Solve for x
    x = 308,819.58/529.17
  6. Step 6: Final answer
    x = 583.59

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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.