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Finding the Fourth Proportional to 1,151.32, 1,588.81 and 627.36

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Solution

The fourth proportional to 1,151.32, 1,588.81 and 627.36 is: 865.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.32 : 1,588.81 = 627.36 : x
  2. Step 2: Convert to fraction form
    1,151.32/1,588.81 = 627.36/x
  3. Step 3: Cross multiply
    1,151.32x = 1,588.81 × 627.36
  4. Step 4: Simplify right side
    1,151.32x = 996,755.84
  5. Step 5: Solve for x
    x = 996,755.84/1,151.32
  6. Step 6: Final answer
    x = 865.75

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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.