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Finding the Fourth Proportional to 218,909.80, 328,623.90 and 217,354.60

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Solution

The fourth proportional to 218,909.80, 328,623.90 and 217,354.60 is: 326,289.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,909.80 : 328,623.90 = 217,354.60 : x
  2. Step 2: Convert to fraction form
    218,909.80/328,623.90 = 217,354.60/x
  3. Step 3: Cross multiply
    218,909.80x = 328,623.90 × 217,354.60
  4. Step 4: Simplify right side
    218,909.80x = 71,427,916,334.94
  5. Step 5: Solve for x
    x = 71,427,916,334.94/218,909.80
  6. Step 6: Final answer
    x = 326,289.26

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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.