Home / 259,724.10-389,586.15-215,400.90

Finding the Fourth Proportional to 259,724.10, 389,586.15 and 215,400.90

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Solution

The fourth proportional to 259,724.10, 389,586.15 and 215,400.90 is: 323,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,724.10 : 389,586.15 = 215,400.90 : x
  2. Step 2: Convert to fraction form
    259,724.10/389,586.15 = 215,400.90/x
  3. Step 3: Cross multiply
    259,724.10x = 389,586.15 × 215,400.90
  4. Step 4: Simplify right side
    259,724.10x = 83,917,207,337.54
  5. Step 5: Solve for x
    x = 83,917,207,337.54/259,724.10
  6. Step 6: Final answer
    x = 323,101.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.