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Finding the Fourth Proportional to 520.55, 718.36 and 284.50

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Solution

The fourth proportional to 520.55, 718.36 and 284.50 is: 392.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.55 : 718.36 = 284.50 : x
  2. Step 2: Convert to fraction form
    520.55/718.36 = 284.50/x
  3. Step 3: Cross multiply
    520.55x = 718.36 × 284.50
  4. Step 4: Simplify right side
    520.55x = 204,373.42
  5. Step 5: Solve for x
    x = 204,373.42/520.55
  6. Step 6: Final answer
    x = 392.61

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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.