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Finding the Fourth Proportional to 266,118.20, 399,177.30 and 191,079.80

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Solution

The fourth proportional to 266,118.20, 399,177.30 and 191,079.80 is: 286,619.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,118.20 : 399,177.30 = 191,079.80 : x
  2. Step 2: Convert to fraction form
    266,118.20/399,177.30 = 191,079.80/x
  3. Step 3: Cross multiply
    266,118.20x = 399,177.30 × 191,079.80
  4. Step 4: Simplify right side
    266,118.20x = 76,274,718,648.54
  5. Step 5: Solve for x
    x = 76,274,718,648.54/266,118.20
  6. Step 6: Final answer
    x = 286,619.70

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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.