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Finding the Fourth Proportional to 524.87, 724.18 and 315.06

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Solution

The fourth proportional to 524.87, 724.18 and 315.06 is: 434.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.87 : 724.18 = 315.06 : x
  2. Step 2: Convert to fraction form
    524.87/724.18 = 315.06/x
  3. Step 3: Cross multiply
    524.87x = 724.18 × 315.06
  4. Step 4: Simplify right side
    524.87x = 228,156.53
  5. Step 5: Solve for x
    x = 228,156.53/524.87
  6. Step 6: Final answer
    x = 434.70

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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.