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Finding the Fourth Proportional to 456.92, 686.04 and 284.32

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Solution

The fourth proportional to 456.92, 686.04 and 284.32 is: 426.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.92 : 686.04 = 284.32 : x
  2. Step 2: Convert to fraction form
    456.92/686.04 = 284.32/x
  3. Step 3: Cross multiply
    456.92x = 686.04 × 284.32
  4. Step 4: Simplify right side
    456.92x = 195,054.89
  5. Step 5: Solve for x
    x = 195,054.89/456.92
  6. Step 6: Final answer
    x = 426.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.