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Finding the Fourth Proportional to 715.56, 984.20 and 575.36

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Solution

The fourth proportional to 715.56, 984.20 and 575.36 is: 791.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.56 : 984.20 = 575.36 : x
  2. Step 2: Convert to fraction form
    715.56/984.20 = 575.36/x
  3. Step 3: Cross multiply
    715.56x = 984.20 × 575.36
  4. Step 4: Simplify right side
    715.56x = 566,269.31
  5. Step 5: Solve for x
    x = 566,269.31/715.56
  6. Step 6: Final answer
    x = 791.37

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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.