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Finding the Fourth Proportional to 1,124.80, 1,552.25 and 627.43

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Solution

The fourth proportional to 1,124.80, 1,552.25 and 627.43 is: 865.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.80 : 1,552.25 = 627.43 : x
  2. Step 2: Convert to fraction form
    1,124.80/1,552.25 = 627.43/x
  3. Step 3: Cross multiply
    1,124.80x = 1,552.25 × 627.43
  4. Step 4: Simplify right side
    1,124.80x = 973,928.22
  5. Step 5: Solve for x
    x = 973,928.22/1,124.80
  6. Step 6: Final answer
    x = 865.87

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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.