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Finding the Fourth Proportional to 478,989.60, 661,049.88 and 275,067.24

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Solution

The fourth proportional to 478,989.60, 661,049.88 and 275,067.24 is: 379,618.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,989.60 : 661,049.88 = 275,067.24 : x
  2. Step 2: Convert to fraction form
    478,989.60/661,049.88 = 275,067.24/x
  3. Step 3: Cross multiply
    478,989.60x = 661,049.88 × 275,067.24
  4. Step 4: Simplify right side
    478,989.60x = 181,833,165,993.93
  5. Step 5: Solve for x
    x = 181,833,165,993.93/478,989.60
  6. Step 6: Final answer
    x = 379,618.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.