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Finding the Fourth Proportional to 1,151.90, 1,589.62 and 627.94

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Solution

The fourth proportional to 1,151.90, 1,589.62 and 627.94 is: 866.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.90 : 1,589.62 = 627.94 : x
  2. Step 2: Convert to fraction form
    1,151.90/1,589.62 = 627.94/x
  3. Step 3: Cross multiply
    1,151.90x = 1,589.62 × 627.94
  4. Step 4: Simplify right side
    1,151.90x = 998,185.98
  5. Step 5: Solve for x
    x = 998,185.98/1,151.90
  6. Step 6: Final answer
    x = 866.56

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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.