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Finding the Fourth Proportional to 525.84, 724.68 and 385.84

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Solution

The fourth proportional to 525.84, 724.68 and 385.84 is: 531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.84 : 724.68 = 385.84 : x
  2. Step 2: Convert to fraction form
    525.84/724.68 = 385.84/x
  3. Step 3: Cross multiply
    525.84x = 724.68 × 385.84
  4. Step 4: Simplify right side
    525.84x = 279,610.53
  5. Step 5: Solve for x
    x = 279,610.53/525.84
  6. Step 6: Final answer
    x = 531.74

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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.