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Finding the Fourth Proportional to 1,125.28, 1,684.50 and 877.96

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Solution

The fourth proportional to 1,125.28, 1,684.50 and 877.96 is: 1,314.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.28 : 1,684.50 = 877.96 : x
  2. Step 2: Convert to fraction form
    1,125.28/1,684.50 = 877.96/x
  3. Step 3: Cross multiply
    1,125.28x = 1,684.50 × 877.96
  4. Step 4: Simplify right side
    1,125.28x = 1,478,923.62
  5. Step 5: Solve for x
    x = 1,478,923.62/1,125.28
  6. Step 6: Final answer
    x = 1,314.27

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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.