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Finding the Fourth Proportional to 1,122.60, 1,549.17 and 625.29

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Solution

The fourth proportional to 1,122.60, 1,549.17 and 625.29 is: 862.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.60 : 1,549.17 = 625.29 : x
  2. Step 2: Convert to fraction form
    1,122.60/1,549.17 = 625.29/x
  3. Step 3: Cross multiply
    1,122.60x = 1,549.17 × 625.29
  4. Step 4: Simplify right side
    1,122.60x = 968,680.51
  5. Step 5: Solve for x
    x = 968,680.51/1,122.60
  6. Step 6: Final answer
    x = 862.89

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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.