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Finding the Fourth Proportional to 310,127.44, 428,042.52 and 189,242.80

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Solution

The fourth proportional to 310,127.44, 428,042.52 and 189,242.80 is: 261,195.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,127.44 : 428,042.52 = 189,242.80 : x
  2. Step 2: Convert to fraction form
    310,127.44/428,042.52 = 189,242.80/x
  3. Step 3: Cross multiply
    310,127.44x = 428,042.52 × 189,242.80
  4. Step 4: Simplify right side
    310,127.44x = 81,003,965,003.86
  5. Step 5: Solve for x
    x = 81,003,965,003.86/310,127.44
  6. Step 6: Final answer
    x = 261,195.74

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1.5x scale

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.