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Finding the Fourth Proportional to 831.50, 1,244.96 and 557.22

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Solution

The fourth proportional to 831.50, 1,244.96 and 557.22 is: 834.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.50 : 1,244.96 = 557.22 : x
  2. Step 2: Convert to fraction form
    831.50/1,244.96 = 557.22/x
  3. Step 3: Cross multiply
    831.50x = 1,244.96 × 557.22
  4. Step 4: Simplify right side
    831.50x = 693,716.61
  5. Step 5: Solve for x
    x = 693,716.61/831.50
  6. Step 6: Final answer
    x = 834.30

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1.5x scale

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.