Home / 1,399.28-2,098.85-474.80

Finding the Fourth Proportional to 1,399.28, 2,098.85 and 474.80

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Solution

The fourth proportional to 1,399.28, 2,098.85 and 474.80 is: 712.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.28 : 2,098.85 = 474.80 : x
  2. Step 2: Convert to fraction form
    1,399.28/2,098.85 = 474.80/x
  3. Step 3: Cross multiply
    1,399.28x = 2,098.85 × 474.80
  4. Step 4: Simplify right side
    1,399.28x = 996,521.11
  5. Step 5: Solve for x
    x = 996,521.11/1,399.28
  6. Step 6: Final answer
    x = 712.17

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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.