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Finding the Fourth Proportional to 520.57, 718.40 and 284.53

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Solution

The fourth proportional to 520.57, 718.40 and 284.53 is: 392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.57 : 718.40 = 284.53 : x
  2. Step 2: Convert to fraction form
    520.57/718.40 = 284.53/x
  3. Step 3: Cross multiply
    520.57x = 718.40 × 284.53
  4. Step 4: Simplify right side
    520.57x = 204,406.35
  5. Step 5: Solve for x
    x = 204,406.35/520.57
  6. Step 6: Final answer
    x = 392.66

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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.