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Finding the Fourth Proportional to 266,135.20, 398,619.60 and 141,330.40

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Solution

The fourth proportional to 266,135.20, 398,619.60 and 141,330.40 is: 211,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,135.20 : 398,619.60 = 141,330.40 : x
  2. Step 2: Convert to fraction form
    266,135.20/398,619.60 = 141,330.40/x
  3. Step 3: Cross multiply
    266,135.20x = 398,619.60 × 141,330.40
  4. Step 4: Simplify right side
    266,135.20x = 56,337,067,515.84
  5. Step 5: Solve for x
    x = 56,337,067,515.84/266,135.20
  6. Step 6: Final answer
    x = 211,685.89

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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.