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Finding the Fourth Proportional to 221,284.40, 331,888.20 and 80,970.80

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Solution

The fourth proportional to 221,284.40, 331,888.20 and 80,970.80 is: 121,442.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,284.40 : 331,888.20 = 80,970.80 : x
  2. Step 2: Convert to fraction form
    221,284.40/331,888.20 = 80,970.80/x
  3. Step 3: Cross multiply
    221,284.40x = 331,888.20 × 80,970.80
  4. Step 4: Simplify right side
    221,284.40x = 26,873,253,064.56
  5. Step 5: Solve for x
    x = 26,873,253,064.56/221,284.40
  6. Step 6: Final answer
    x = 121,442.15

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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.