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Finding the Fourth Proportional to 525.88, 724.50 and 415.31

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Solution

The fourth proportional to 525.88, 724.50 and 415.31 is: 572.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.88 : 724.50 = 415.31 : x
  2. Step 2: Convert to fraction form
    525.88/724.50 = 415.31/x
  3. Step 3: Cross multiply
    525.88x = 724.50 × 415.31
  4. Step 4: Simplify right side
    525.88x = 300,892.10
  5. Step 5: Solve for x
    x = 300,892.10/525.88
  6. Step 6: Final answer
    x = 572.17

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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.