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Finding the Fourth Proportional to 1,151.68, 1,589.36 and 627.72

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Solution

The fourth proportional to 1,151.68, 1,589.36 and 627.72 is: 866.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,151.68 : 1,589.36 = 627.72 : x
  2. Step 2: Convert to fraction form
    1,151.68/1,589.36 = 627.72/x
  3. Step 3: Cross multiply
    1,151.68x = 1,589.36 × 627.72
  4. Step 4: Simplify right side
    1,151.68x = 997,673.06
  5. Step 5: Solve for x
    x = 997,673.06/1,151.68
  6. Step 6: Final answer
    x = 866.28

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1.5x scale

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.