Home / 1,414.65-2,121.15-427.17

Finding the Fourth Proportional to 1,414.65, 2,121.15 and 427.17

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Solution

The fourth proportional to 1,414.65, 2,121.15 and 427.17 is: 640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.65 : 2,121.15 = 427.17 : x
  2. Step 2: Convert to fraction form
    1,414.65/2,121.15 = 427.17/x
  3. Step 3: Cross multiply
    1,414.65x = 2,121.15 × 427.17
  4. Step 4: Simplify right side
    1,414.65x = 906,101.20
  5. Step 5: Solve for x
    x = 906,101.20/1,414.65
  6. Step 6: Final answer
    x = 640.51

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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.