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Finding the Fourth Proportional to 1,151.34, 1,588.85 and 627.40

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Solution

The fourth proportional to 1,151.34, 1,588.85 and 627.40 is: 865.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.34 : 1,588.85 = 627.40 : x
  2. Step 2: Convert to fraction form
    1,151.34/1,588.85 = 627.40/x
  3. Step 3: Cross multiply
    1,151.34x = 1,588.85 × 627.40
  4. Step 4: Simplify right side
    1,151.34x = 996,844.49
  5. Step 5: Solve for x
    x = 996,844.49/1,151.34
  6. Step 6: Final answer
    x = 865.81

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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.