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Finding the Fourth Proportional to 1,151.13, 1,588.56 and 627.16

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Solution

The fourth proportional to 1,151.13, 1,588.56 and 627.16 is: 865.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.13 : 1,588.56 = 627.16 : x
  2. Step 2: Convert to fraction form
    1,151.13/1,588.56 = 627.16/x
  3. Step 3: Cross multiply
    1,151.13x = 1,588.56 × 627.16
  4. Step 4: Simplify right side
    1,151.13x = 996,281.29
  5. Step 5: Solve for x
    x = 996,281.29/1,151.13
  6. Step 6: Final answer
    x = 865.48

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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.