Home / 1,772.20-2,658.16-1,121.50

Finding the Fourth Proportional to 1,772.20, 2,658.16 and 1,121.50

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Solution

The fourth proportional to 1,772.20, 2,658.16 and 1,121.50 is: 1,682.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,772.20 : 2,658.16 = 1,121.50 : x
  2. Step 2: Convert to fraction form
    1,772.20/2,658.16 = 1,121.50/x
  3. Step 3: Cross multiply
    1,772.20x = 2,658.16 × 1,121.50
  4. Step 4: Simplify right side
    1,772.20x = 2,981,126.44
  5. Step 5: Solve for x
    x = 2,981,126.44/1,772.20
  6. Step 6: Final answer
    x = 1,682.16

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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.