Home / 258,028.38-386,843.85-80,430.30

Finding the Fourth Proportional to 258,028.38, 386,843.85 and 80,430.30

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Solution

The fourth proportional to 258,028.38, 386,843.85 and 80,430.30 is: 120,583.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,028.38 : 386,843.85 = 80,430.30 : x
  2. Step 2: Convert to fraction form
    258,028.38/386,843.85 = 80,430.30/x
  3. Step 3: Cross multiply
    258,028.38x = 386,843.85 × 80,430.30
  4. Step 4: Simplify right side
    258,028.38x = 31,113,966,908.66
  5. Step 5: Solve for x
    x = 31,113,966,908.66/258,028.38
  6. Step 6: Final answer
    x = 120,583.51

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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.