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Finding the Fourth Proportional to 220,707, 331,125.78 and 127,279.80

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Solution

The fourth proportional to 220,707, 331,125.78 and 127,279.80 is: 190,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,707 : 331,125.78 = 127,279.80 : x
  2. Step 2: Convert to fraction form
    220,707/331,125.78 = 127,279.80/x
  3. Step 3: Cross multiply
    220,707x = 331,125.78 × 127,279.80
  4. Step 4: Simplify right side
    220,707x = 42,145,623,053.24
  5. Step 5: Solve for x
    x = 42,145,623,053.24/220,707
  6. Step 6: Final answer
    x = 190,957.35

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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.