Home / 260,759.10-391,138.65-221,490.30

Finding the Fourth Proportional to 260,759.10, 391,138.65 and 221,490.30

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Solution

The fourth proportional to 260,759.10, 391,138.65 and 221,490.30 is: 332,235.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,759.10 : 391,138.65 = 221,490.30 : x
  2. Step 2: Convert to fraction form
    260,759.10/391,138.65 = 221,490.30/x
  3. Step 3: Cross multiply
    260,759.10x = 391,138.65 × 221,490.30
  4. Step 4: Simplify right side
    260,759.10x = 86,633,416,930.10
  5. Step 5: Solve for x
    x = 86,633,416,930.10/260,759.10
  6. Step 6: Final answer
    x = 332,235.45

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1.5x scale

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.