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Finding the Fourth Proportional to 480,069.20, 720,103.80 and 386,757.20

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Solution

The fourth proportional to 480,069.20, 720,103.80 and 386,757.20 is: 580,135.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,069.20 : 720,103.80 = 386,757.20 : x
  2. Step 2: Convert to fraction form
    480,069.20/720,103.80 = 386,757.20/x
  3. Step 3: Cross multiply
    480,069.20x = 720,103.80 × 386,757.20
  4. Step 4: Simplify right side
    480,069.20x = 278,505,329,397.36
  5. Step 5: Solve for x
    x = 278,505,329,397.36/480,069.20
  6. Step 6: Final answer
    x = 580,135.80

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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.