Home / 387,211.20-580,845.60-137,860.80

Finding the Fourth Proportional to 387,211.20, 580,845.60 and 137,860.80

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Solution

The fourth proportional to 387,211.20, 580,845.60 and 137,860.80 is: 206,801.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,211.20 : 580,845.60 = 137,860.80 : x
  2. Step 2: Convert to fraction form
    387,211.20/580,845.60 = 137,860.80/x
  3. Step 3: Cross multiply
    387,211.20x = 580,845.60 × 137,860.80
  4. Step 4: Simplify right side
    387,211.20x = 80,075,839,092.48
  5. Step 5: Solve for x
    x = 80,075,839,092.48/387,211.20
  6. Step 6: Final answer
    x = 206,801.45

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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.