Home / 1,432.29-1,979.68-1,321.57

Finding the Fourth Proportional to 1,432.29, 1,979.68 and 1,321.57

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Solution

The fourth proportional to 1,432.29, 1,979.68 and 1,321.57 is: 1,826.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.29 : 1,979.68 = 1,321.57 : x
  2. Step 2: Convert to fraction form
    1,432.29/1,979.68 = 1,321.57/x
  3. Step 3: Cross multiply
    1,432.29x = 1,979.68 × 1,321.57
  4. Step 4: Simplify right side
    1,432.29x = 2,616,285.70
  5. Step 5: Solve for x
    x = 2,616,285.70/1,432.29
  6. Step 6: Final answer
    x = 1,826.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.