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Finding the Fourth Proportional to 484,307.80, 726,720.90 and 218,109.40

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Solution

The fourth proportional to 484,307.80, 726,720.90 and 218,109.40 is: 327,280.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,307.80 : 726,720.90 = 218,109.40 : x
  2. Step 2: Convert to fraction form
    484,307.80/726,720.90 = 218,109.40/x
  3. Step 3: Cross multiply
    484,307.80x = 726,720.90 × 218,109.40
  4. Step 4: Simplify right side
    484,307.80x = 158,504,659,466.46
  5. Step 5: Solve for x
    x = 158,504,659,466.46/484,307.80
  6. Step 6: Final answer
    x = 327,280.83

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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.