Home / 1,545.39-2,132.86-985.68

Finding the Fourth Proportional to 1,545.39, 2,132.86 and 985.68

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Solution

The fourth proportional to 1,545.39, 2,132.86 and 985.68 is: 1,360.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.39 : 2,132.86 = 985.68 : x
  2. Step 2: Convert to fraction form
    1,545.39/2,132.86 = 985.68/x
  3. Step 3: Cross multiply
    1,545.39x = 2,132.86 × 985.68
  4. Step 4: Simplify right side
    1,545.39x = 2,102,312.52
  5. Step 5: Solve for x
    x = 2,102,312.52/1,545.39
  6. Step 6: Final answer
    x = 1,360.38

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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.