Home / 1,474.40-2,211.12-780.68

Finding the Fourth Proportional to 1,474.40, 2,211.12 and 780.68

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Solution

The fourth proportional to 1,474.40, 2,211.12 and 780.68 is: 1,170.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.40 : 2,211.12 = 780.68 : x
  2. Step 2: Convert to fraction form
    1,474.40/2,211.12 = 780.68/x
  3. Step 3: Cross multiply
    1,474.40x = 2,211.12 × 780.68
  4. Step 4: Simplify right side
    1,474.40x = 1,726,177.16
  5. Step 5: Solve for x
    x = 1,726,177.16/1,474.40
  6. Step 6: Final answer
    x = 1,170.77

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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.