Home / 1,439.03-2,158.17-617.21

Finding the Fourth Proportional to 1,439.03, 2,158.17 and 617.21

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Solution

The fourth proportional to 1,439.03, 2,158.17 and 617.21 is: 925.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.03 : 2,158.17 = 617.21 : x
  2. Step 2: Convert to fraction form
    1,439.03/2,158.17 = 617.21/x
  3. Step 3: Cross multiply
    1,439.03x = 2,158.17 × 617.21
  4. Step 4: Simplify right side
    1,439.03x = 1,332,033.31
  5. Step 5: Solve for x
    x = 1,332,033.31/1,439.03
  6. Step 6: Final answer
    x = 925.65

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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.