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Finding the Fourth Proportional to 486,015.40, 729,241.80 and 219,638.80

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Solution

The fourth proportional to 486,015.40, 729,241.80 and 219,638.80 is: 329,557.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,015.40 : 729,241.80 = 219,638.80 : x
  2. Step 2: Convert to fraction form
    486,015.40/729,241.80 = 219,638.80/x
  3. Step 3: Cross multiply
    486,015.40x = 729,241.80 × 219,638.80
  4. Step 4: Simplify right side
    486,015.40x = 160,169,793,861.84
  5. Step 5: Solve for x
    x = 160,169,793,861.84/486,015.40
  6. Step 6: Final answer
    x = 329,557.03

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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.