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Finding the Fourth Proportional to 387,077.30, 580,616 and 120,860.62

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Solution

The fourth proportional to 387,077.30, 580,616 and 120,860.62 is: 181,290.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,077.30 : 580,616 = 120,860.62 : x
  2. Step 2: Convert to fraction form
    387,077.30/580,616 = 120,860.62/x
  3. Step 3: Cross multiply
    387,077.30x = 580,616 × 120,860.62
  4. Step 4: Simplify right side
    387,077.30x = 70,173,609,741.92
  5. Step 5: Solve for x
    x = 70,173,609,741.92/387,077.30
  6. Step 6: Final answer
    x = 181,290.95

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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.