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Finding the Fourth Proportional to 1,123.26, 1,549.96 and 625.87

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Solution

The fourth proportional to 1,123.26, 1,549.96 and 625.87 is: 863.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.26 : 1,549.96 = 625.87 : x
  2. Step 2: Convert to fraction form
    1,123.26/1,549.96 = 625.87/x
  3. Step 3: Cross multiply
    1,123.26x = 1,549.96 × 625.87
  4. Step 4: Simplify right side
    1,123.26x = 970,065.72
  5. Step 5: Solve for x
    x = 970,065.72/1,123.26
  6. Step 6: Final answer
    x = 863.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.