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Finding the Fourth Proportional to 386,698.92, 580,048.43 and 120,480.90

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Solution

The fourth proportional to 386,698.92, 580,048.43 and 120,480.90 is: 180,721.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,698.92 : 580,048.43 = 120,480.90 : x
  2. Step 2: Convert to fraction form
    386,698.92/580,048.43 = 120,480.90/x
  3. Step 3: Cross multiply
    386,698.92x = 580,048.43 × 120,480.90
  4. Step 4: Simplify right side
    386,698.92x = 69,884,756,287.58
  5. Step 5: Solve for x
    x = 69,884,756,287.58/386,698.92
  6. Step 6: Final answer
    x = 180,721.36

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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.