Home / 1,011.18-1,517.82-621.45

Finding the Fourth Proportional to 1,011.18, 1,517.82 and 621.45

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Solution

The fourth proportional to 1,011.18, 1,517.82 and 621.45 is: 932.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.18 : 1,517.82 = 621.45 : x
  2. Step 2: Convert to fraction form
    1,011.18/1,517.82 = 621.45/x
  3. Step 3: Cross multiply
    1,011.18x = 1,517.82 × 621.45
  4. Step 4: Simplify right side
    1,011.18x = 943,249.24
  5. Step 5: Solve for x
    x = 943,249.24/1,011.18
  6. Step 6: Final answer
    x = 932.82

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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.