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Finding the Fourth Proportional to 326,267.70, 488,753.55 and 287,301.30

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Solution

The fourth proportional to 326,267.70, 488,753.55 and 287,301.30 is: 430,381.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,267.70 : 488,753.55 = 287,301.30 : x
  2. Step 2: Convert to fraction form
    326,267.70/488,753.55 = 287,301.30/x
  3. Step 3: Cross multiply
    326,267.70x = 488,753.55 × 287,301.30
  4. Step 4: Simplify right side
    326,267.70x = 140,419,530,294.62
  5. Step 5: Solve for x
    x = 140,419,530,294.62/326,267.70
  6. Step 6: Final answer
    x = 430,381.34

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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.