Home / 1,432.71-2,158.11-1,280.43

Finding the Fourth Proportional to 1,432.71, 2,158.11 and 1,280.43

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Solution

The fourth proportional to 1,432.71, 2,158.11 and 1,280.43 is: 1,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.71 : 2,158.11 = 1,280.43 : x
  2. Step 2: Convert to fraction form
    1,432.71/2,158.11 = 1,280.43/x
  3. Step 3: Cross multiply
    1,432.71x = 2,158.11 × 1,280.43
  4. Step 4: Simplify right side
    1,432.71x = 2,763,308.79
  5. Step 5: Solve for x
    x = 2,763,308.79/1,432.71
  6. Step 6: Final answer
    x = 1,928.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.