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Finding the Fourth Proportional to 525.08, 724.68 and 378.20

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Solution

The fourth proportional to 525.08, 724.68 and 378.20 is: 521.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.08 : 724.68 = 378.20 : x
  2. Step 2: Convert to fraction form
    525.08/724.68 = 378.20/x
  3. Step 3: Cross multiply
    525.08x = 724.68 × 378.20
  4. Step 4: Simplify right side
    525.08x = 274,073.98
  5. Step 5: Solve for x
    x = 274,073.98/525.08
  6. Step 6: Final answer
    x = 521.97

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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.