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Finding the Fourth Proportional to 1,124.72, 1,552 and 627.32

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Solution

The fourth proportional to 1,124.72, 1,552 and 627.32 is: 865.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.72 : 1,552 = 627.32 : x
  2. Step 2: Convert to fraction form
    1,124.72/1,552 = 627.32/x
  3. Step 3: Cross multiply
    1,124.72x = 1,552 × 627.32
  4. Step 4: Simplify right side
    1,124.72x = 973,600.64
  5. Step 5: Solve for x
    x = 973,600.64/1,124.72
  6. Step 6: Final answer
    x = 865.64

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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.