Home / 1,116.10-1,674.15-921.70

Finding the Fourth Proportional to 1,116.10, 1,674.15 and 921.70

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Solution

The fourth proportional to 1,116.10, 1,674.15 and 921.70 is: 1,382.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.10 : 1,674.15 = 921.70 : x
  2. Step 2: Convert to fraction form
    1,116.10/1,674.15 = 921.70/x
  3. Step 3: Cross multiply
    1,116.10x = 1,674.15 × 921.70
  4. Step 4: Simplify right side
    1,116.10x = 1,543,064.06
  5. Step 5: Solve for x
    x = 1,543,064.06/1,116.10
  6. Step 6: Final answer
    x = 1,382.55

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Similar ratio
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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.