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Finding the Fourth Proportional to 1,124.74, 1,552.21 and 627.47

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Solution

The fourth proportional to 1,124.74, 1,552.21 and 627.47 is: 865.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.74 : 1,552.21 = 627.47 : x
  2. Step 2: Convert to fraction form
    1,124.74/1,552.21 = 627.47/x
  3. Step 3: Cross multiply
    1,124.74x = 1,552.21 × 627.47
  4. Step 4: Simplify right side
    1,124.74x = 973,969.59
  5. Step 5: Solve for x
    x = 973,969.59/1,124.74
  6. Step 6: Final answer
    x = 865.95

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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.