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Finding the Fourth Proportional to 667,511.80, 1,001,364.90 and 218,123.80

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Solution

The fourth proportional to 667,511.80, 1,001,364.90 and 218,123.80 is: 327,217.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,511.80 : 1,001,364.90 = 218,123.80 : x
  2. Step 2: Convert to fraction form
    667,511.80/1,001,364.90 = 218,123.80/x
  3. Step 3: Cross multiply
    667,511.80x = 1,001,364.90 × 218,123.80
  4. Step 4: Simplify right side
    667,511.80x = 218,421,517,174.62
  5. Step 5: Solve for x
    x = 218,421,517,174.62/667,511.80
  6. Step 6: Final answer
    x = 327,217.46

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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.