Home / 1,591.40-2,387.42-769.22

Finding the Fourth Proportional to 1,591.40, 2,387.42 and 769.22

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Solution

The fourth proportional to 1,591.40, 2,387.42 and 769.22 is: 1,153.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.40 : 2,387.42 = 769.22 : x
  2. Step 2: Convert to fraction form
    1,591.40/2,387.42 = 769.22/x
  3. Step 3: Cross multiply
    1,591.40x = 2,387.42 × 769.22
  4. Step 4: Simplify right side
    1,591.40x = 1,836,451.21
  5. Step 5: Solve for x
    x = 1,836,451.21/1,591.40
  6. Step 6: Final answer
    x = 1,153.98

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1.5x scale

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.