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Finding the Fourth Proportional to 715.26, 984.69 and 627.90

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Solution

The fourth proportional to 715.26, 984.69 and 627.90 is: 864.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.26 : 984.69 = 627.90 : x
  2. Step 2: Convert to fraction form
    715.26/984.69 = 627.90/x
  3. Step 3: Cross multiply
    715.26x = 984.69 × 627.90
  4. Step 4: Simplify right side
    715.26x = 618,286.85
  5. Step 5: Solve for x
    x = 618,286.85/715.26
  6. Step 6: Final answer
    x = 864.42

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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.