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Finding the Fourth Proportional to 524.57, 724.28 and 394.29

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Solution

The fourth proportional to 524.57, 724.28 and 394.29 is: 544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.57 : 724.28 = 394.29 : x
  2. Step 2: Convert to fraction form
    524.57/724.28 = 394.29/x
  3. Step 3: Cross multiply
    524.57x = 724.28 × 394.29
  4. Step 4: Simplify right side
    524.57x = 285,574.39
  5. Step 5: Solve for x
    x = 285,574.39/524.57
  6. Step 6: Final answer
    x = 544.40

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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.