Home / 1,178.30-1,626.13-680.96

Finding the Fourth Proportional to 1,178.30, 1,626.13 and 680.96

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Solution

The fourth proportional to 1,178.30, 1,626.13 and 680.96 is: 939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.30 : 1,626.13 = 680.96 : x
  2. Step 2: Convert to fraction form
    1,178.30/1,626.13 = 680.96/x
  3. Step 3: Cross multiply
    1,178.30x = 1,626.13 × 680.96
  4. Step 4: Simplify right side
    1,178.30x = 1,107,329.48
  5. Step 5: Solve for x
    x = 1,107,329.48/1,178.30
  6. Step 6: Final answer
    x = 939.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.