Home / 1,545.20-2,131.85-881.58

Finding the Fourth Proportional to 1,545.20, 2,131.85 and 881.58

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Solution

The fourth proportional to 1,545.20, 2,131.85 and 881.58 is: 1,216.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.20 : 2,131.85 = 881.58 : x
  2. Step 2: Convert to fraction form
    1,545.20/2,131.85 = 881.58/x
  3. Step 3: Cross multiply
    1,545.20x = 2,131.85 × 881.58
  4. Step 4: Simplify right side
    1,545.20x = 1,879,385.66
  5. Step 5: Solve for x
    x = 1,879,385.66/1,545.20
  6. Step 6: Final answer
    x = 1,216.27

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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.