Home / 1,434.65-2,151.34-408.41

Finding the Fourth Proportional to 1,434.65, 2,151.34 and 408.41

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Solution

The fourth proportional to 1,434.65, 2,151.34 and 408.41 is: 612.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.65 : 2,151.34 = 408.41 : x
  2. Step 2: Convert to fraction form
    1,434.65/2,151.34 = 408.41/x
  3. Step 3: Cross multiply
    1,434.65x = 2,151.34 × 408.41
  4. Step 4: Simplify right side
    1,434.65x = 878,626.73
  5. Step 5: Solve for x
    x = 878,626.73/1,434.65
  6. Step 6: Final answer
    x = 612.43

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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.