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Finding the Fourth Proportional to 386,697.67, 580,046.55 and 120,479.65

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Solution

The fourth proportional to 386,697.67, 580,046.55 and 120,479.65 is: 180,719.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,697.67 : 580,046.55 = 120,479.65 : x
  2. Step 2: Convert to fraction form
    386,697.67/580,046.55 = 120,479.65/x
  3. Step 3: Cross multiply
    386,697.67x = 580,046.55 × 120,479.65
  4. Step 4: Simplify right side
    386,697.67x = 69,883,805,327.71
  5. Step 5: Solve for x
    x = 69,883,805,327.71/386,697.67
  6. Step 6: Final answer
    x = 180,719.49

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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.