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Finding the Fourth Proportional to 221,306.80, 331,879.20 and 71,586.40

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Solution

The fourth proportional to 221,306.80, 331,879.20 and 71,586.40 is: 107,353.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,306.80 : 331,879.20 = 71,586.40 : x
  2. Step 2: Convert to fraction form
    221,306.80/331,879.20 = 71,586.40/x
  3. Step 3: Cross multiply
    221,306.80x = 331,879.20 × 71,586.40
  4. Step 4: Simplify right side
    221,306.80x = 23,758,037,162.88
  5. Step 5: Solve for x
    x = 23,758,037,162.88/221,306.80
  6. Step 6: Final answer
    x = 107,353.40

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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.