Home / 1,125.28-1,685.49-1,097.74

Finding the Fourth Proportional to 1,125.28, 1,685.49 and 1,097.74

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Solution

The fourth proportional to 1,125.28, 1,685.49 and 1,097.74 is: 1,644.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.28 : 1,685.49 = 1,097.74 : x
  2. Step 2: Convert to fraction form
    1,125.28/1,685.49 = 1,097.74/x
  3. Step 3: Cross multiply
    1,125.28x = 1,685.49 × 1,097.74
  4. Step 4: Simplify right side
    1,125.28x = 1,850,229.79
  5. Step 5: Solve for x
    x = 1,850,229.79/1,125.28
  6. Step 6: Final answer
    x = 1,644.24

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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.