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Finding the Fourth Proportional to 386,701.80, 580,052.69 and 120,483.82

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Solution

The fourth proportional to 386,701.80, 580,052.69 and 120,483.82 is: 180,725.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,701.80 : 580,052.69 = 120,483.82 : x
  2. Step 2: Convert to fraction form
    386,701.80/580,052.69 = 120,483.82/x
  3. Step 3: Cross multiply
    386,701.80x = 580,052.69 × 120,483.82
  4. Step 4: Simplify right side
    386,701.80x = 69,886,963,892.48
  5. Step 5: Solve for x
    x = 69,886,963,892.48/386,701.80
  6. Step 6: Final answer
    x = 180,725.73

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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.