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Finding the Fourth Proportional to 831.76, 1,246.47 and 461.73

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Solution

The fourth proportional to 831.76, 1,246.47 and 461.73 is: 691.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.76 : 1,246.47 = 461.73 : x
  2. Step 2: Convert to fraction form
    831.76/1,246.47 = 461.73/x
  3. Step 3: Cross multiply
    831.76x = 1,246.47 × 461.73
  4. Step 4: Simplify right side
    831.76x = 575,530.86
  5. Step 5: Solve for x
    x = 575,530.86/831.76
  6. Step 6: Final answer
    x = 691.94

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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.