Home / 1,617.22-2,425.70-921.70

Finding the Fourth Proportional to 1,617.22, 2,425.70 and 921.70

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Solution

The fourth proportional to 1,617.22, 2,425.70 and 921.70 is: 1,382.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.22 : 2,425.70 = 921.70 : x
  2. Step 2: Convert to fraction form
    1,617.22/2,425.70 = 921.70/x
  3. Step 3: Cross multiply
    1,617.22x = 2,425.70 × 921.70
  4. Step 4: Simplify right side
    1,617.22x = 2,235,754.20
  5. Step 5: Solve for x
    x = 2,235,754.20/1,617.22
  6. Step 6: Final answer
    x = 1,382.47

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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.