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Finding the Fourth Proportional to 1,151.79, 1,589.48 and 627.83

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Solution

The fourth proportional to 1,151.79, 1,589.48 and 627.83 is: 866.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.79 : 1,589.48 = 627.83 : x
  2. Step 2: Convert to fraction form
    1,151.79/1,589.48 = 627.83/x
  3. Step 3: Cross multiply
    1,151.79x = 1,589.48 × 627.83
  4. Step 4: Simplify right side
    1,151.79x = 997,915.28
  5. Step 5: Solve for x
    x = 997,915.28/1,151.79
  6. Step 6: Final answer
    x = 866.40

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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.