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Finding the Fourth Proportional to 1,149.57, 1,724.93 and 456.74

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Solution

The fourth proportional to 1,149.57, 1,724.93 and 456.74 is: 685.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.57 : 1,724.93 = 456.74 : x
  2. Step 2: Convert to fraction form
    1,149.57/1,724.93 = 456.74/x
  3. Step 3: Cross multiply
    1,149.57x = 1,724.93 × 456.74
  4. Step 4: Simplify right side
    1,149.57x = 787,844.53
  5. Step 5: Solve for x
    x = 787,844.53/1,149.57
  6. Step 6: Final answer
    x = 685.34

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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.