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Finding the Fourth Proportional to 831.87, 1,248.01 and 283.91

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Solution

The fourth proportional to 831.87, 1,248.01 and 283.91 is: 425.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.87 : 1,248.01 = 283.91 : x
  2. Step 2: Convert to fraction form
    831.87/1,248.01 = 283.91/x
  3. Step 3: Cross multiply
    831.87x = 1,248.01 × 283.91
  4. Step 4: Simplify right side
    831.87x = 354,315.57
  5. Step 5: Solve for x
    x = 354,315.57/831.87
  6. Step 6: Final answer
    x = 425.93

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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.