Home / 1,439.12-2,158.79-617.19

Finding the Fourth Proportional to 1,439.12, 2,158.79 and 617.19

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Solution

The fourth proportional to 1,439.12, 2,158.79 and 617.19 is: 925.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,439.12 : 2,158.79 = 617.19 : x
  2. Step 2: Convert to fraction form
    1,439.12/2,158.79 = 617.19/x
  3. Step 3: Cross multiply
    1,439.12x = 2,158.79 × 617.19
  4. Step 4: Simplify right side
    1,439.12x = 1,332,385.14
  5. Step 5: Solve for x
    x = 1,332,385.14/1,439.12
  6. Step 6: Final answer
    x = 925.84

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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.