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Finding the Fourth Proportional to 767.46, 1,149.67 and 458.45

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Solution

The fourth proportional to 767.46, 1,149.67 and 458.45 is: 686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.46 : 1,149.67 = 458.45 : x
  2. Step 2: Convert to fraction form
    767.46/1,149.67 = 458.45/x
  3. Step 3: Cross multiply
    767.46x = 1,149.67 × 458.45
  4. Step 4: Simplify right side
    767.46x = 527,066.21
  5. Step 5: Solve for x
    x = 527,066.21/767.46
  6. Step 6: Final answer
    x = 686.77

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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.