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Finding the Fourth Proportional to 386,886.20, 580,329.30 and 245,168.60

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Solution

The fourth proportional to 386,886.20, 580,329.30 and 245,168.60 is: 367,752.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,886.20 : 580,329.30 = 245,168.60 : x
  2. Step 2: Convert to fraction form
    386,886.20/580,329.30 = 245,168.60/x
  3. Step 3: Cross multiply
    386,886.20x = 580,329.30 × 245,168.60
  4. Step 4: Simplify right side
    386,886.20x = 142,278,522,019.98
  5. Step 5: Solve for x
    x = 142,278,522,019.98/386,886.20
  6. Step 6: Final answer
    x = 367,752.90

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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.