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Finding the Fourth Proportional to 1,122.60, 1,549.20 and 625.24

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Solution

The fourth proportional to 1,122.60, 1,549.20 and 625.24 is: 862.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.60 : 1,549.20 = 625.24 : x
  2. Step 2: Convert to fraction form
    1,122.60/1,549.20 = 625.24/x
  3. Step 3: Cross multiply
    1,122.60x = 1,549.20 × 625.24
  4. Step 4: Simplify right side
    1,122.60x = 968,622.04
  5. Step 5: Solve for x
    x = 968,622.04/1,122.60
  6. Step 6: Final answer
    x = 862.84

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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.