Home / 1,545.31-2,135.23-1,216.35

Finding the Fourth Proportional to 1,545.31, 2,135.23 and 1,216.35

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Solution

The fourth proportional to 1,545.31, 2,135.23 and 1,216.35 is: 1,680.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.31 : 2,135.23 = 1,216.35 : x
  2. Step 2: Convert to fraction form
    1,545.31/2,135.23 = 1,216.35/x
  3. Step 3: Cross multiply
    1,545.31x = 2,135.23 × 1,216.35
  4. Step 4: Simplify right side
    1,545.31x = 2,597,183.97
  5. Step 5: Solve for x
    x = 2,597,183.97/1,545.31
  6. Step 6: Final answer
    x = 1,680.69

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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.