Home / 1,545.46-2,132.13-985.78

Finding the Fourth Proportional to 1,545.46, 2,132.13 and 985.78

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Solution

The fourth proportional to 1,545.46, 2,132.13 and 985.78 is: 1,359.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.46 : 2,132.13 = 985.78 : x
  2. Step 2: Convert to fraction form
    1,545.46/2,132.13 = 985.78/x
  3. Step 3: Cross multiply
    1,545.46x = 2,132.13 × 985.78
  4. Step 4: Simplify right side
    1,545.46x = 2,101,811.11
  5. Step 5: Solve for x
    x = 2,101,811.11/1,545.46
  6. Step 6: Final answer
    x = 1,359.99

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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.