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Finding the Fourth Proportional to 525.24, 724.50 and 378.18

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Solution

The fourth proportional to 525.24, 724.50 and 378.18 is: 521.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.24 : 724.50 = 378.18 : x
  2. Step 2: Convert to fraction form
    525.24/724.50 = 378.18/x
  3. Step 3: Cross multiply
    525.24x = 724.50 × 378.18
  4. Step 4: Simplify right side
    525.24x = 273,991.41
  5. Step 5: Solve for x
    x = 273,991.41/525.24
  6. Step 6: Final answer
    x = 521.65

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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.