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Finding the Fourth Proportional to 831.48, 1,245.24 and 483.96

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Solution

The fourth proportional to 831.48, 1,245.24 and 483.96 is: 724.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.48 : 1,245.24 = 483.96 : x
  2. Step 2: Convert to fraction form
    831.48/1,245.24 = 483.96/x
  3. Step 3: Cross multiply
    831.48x = 1,245.24 × 483.96
  4. Step 4: Simplify right side
    831.48x = 602,646.35
  5. Step 5: Solve for x
    x = 602,646.35/831.48
  6. Step 6: Final answer
    x = 724.79

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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.