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Finding the Fourth Proportional to 387,076.80, 580,615.24 and 120,860.12

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Solution

The fourth proportional to 387,076.80, 580,615.24 and 120,860.12 is: 181,290.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,076.80 : 580,615.24 = 120,860.12 : x
  2. Step 2: Convert to fraction form
    387,076.80/580,615.24 = 120,860.12/x
  3. Step 3: Cross multiply
    387,076.80x = 580,615.24 × 120,860.12
  4. Step 4: Simplify right side
    387,076.80x = 70,173,227,580.23
  5. Step 5: Solve for x
    x = 70,173,227,580.23/387,076.80
  6. Step 6: Final answer
    x = 181,290.19

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Similar ratio
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1.5x scale

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.