Home / 1,213.28-1,818.56-519.60

Finding the Fourth Proportional to 1,213.28, 1,818.56 and 519.60

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Solution

The fourth proportional to 1,213.28, 1,818.56 and 519.60 is: 778.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.28 : 1,818.56 = 519.60 : x
  2. Step 2: Convert to fraction form
    1,213.28/1,818.56 = 519.60/x
  3. Step 3: Cross multiply
    1,213.28x = 1,818.56 × 519.60
  4. Step 4: Simplify right side
    1,213.28x = 944,923.78
  5. Step 5: Solve for x
    x = 944,923.78/1,213.28
  6. Step 6: Final answer
    x = 778.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.