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Finding the Fourth Proportional to 938.85, 1,295.61 and 519.22

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Solution

The fourth proportional to 938.85, 1,295.61 and 519.22 is: 716.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    938.85 : 1,295.61 = 519.22 : x
  2. Step 2: Convert to fraction form
    938.85/1,295.61 = 519.22/x
  3. Step 3: Cross multiply
    938.85x = 1,295.61 × 519.22
  4. Step 4: Simplify right side
    938.85x = 672,708.85
  5. Step 5: Solve for x
    x = 672,708.85/938.85
  6. Step 6: Final answer
    x = 716.52

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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.