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Finding the Fourth Proportional to 221,991.40, 332,987.10 and 155,506.60

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Solution

The fourth proportional to 221,991.40, 332,987.10 and 155,506.60 is: 233,259.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,991.40 : 332,987.10 = 155,506.60 : x
  2. Step 2: Convert to fraction form
    221,991.40/332,987.10 = 155,506.60/x
  3. Step 3: Cross multiply
    221,991.40x = 332,987.10 × 155,506.60
  4. Step 4: Simplify right side
    221,991.40x = 51,781,691,764.86
  5. Step 5: Solve for x
    x = 51,781,691,764.86/221,991.40
  6. Step 6: Final answer
    x = 233,259.90

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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.