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Finding the Fourth Proportional to 831.63, 1,248.54 and 558.96

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Solution

The fourth proportional to 831.63, 1,248.54 and 558.96 is: 839.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.63 : 1,248.54 = 558.96 : x
  2. Step 2: Convert to fraction form
    831.63/1,248.54 = 558.96/x
  3. Step 3: Cross multiply
    831.63x = 1,248.54 × 558.96
  4. Step 4: Simplify right side
    831.63x = 697,883.92
  5. Step 5: Solve for x
    x = 697,883.92/831.63
  6. Step 6: Final answer
    x = 839.18

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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.