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Finding the Fourth Proportional to 1,122.91, 1,549.55 and 625.57

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Solution

The fourth proportional to 1,122.91, 1,549.55 and 625.57 is: 863.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.91 : 1,549.55 = 625.57 : x
  2. Step 2: Convert to fraction form
    1,122.91/1,549.55 = 625.57/x
  3. Step 3: Cross multiply
    1,122.91x = 1,549.55 × 625.57
  4. Step 4: Simplify right side
    1,122.91x = 969,349.68
  5. Step 5: Solve for x
    x = 969,349.68/1,122.91
  6. Step 6: Final answer
    x = 863.25

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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.