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Finding the Fourth Proportional to 266,795.60, 399,707.40 and 211,002.80

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Solution

The fourth proportional to 266,795.60, 399,707.40 and 211,002.80 is: 316,119.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,795.60 : 399,707.40 = 211,002.80 : x
  2. Step 2: Convert to fraction form
    266,795.60/399,707.40 = 211,002.80/x
  3. Step 3: Cross multiply
    266,795.60x = 399,707.40 × 211,002.80
  4. Step 4: Simplify right side
    266,795.60x = 84,339,380,580.72
  5. Step 5: Solve for x
    x = 84,339,380,580.72/266,795.60
  6. Step 6: Final answer
    x = 316,119.83

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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.