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Finding the Fourth Proportional to 485,649.96, 727,101.22 and 257,425.56

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Solution

The fourth proportional to 485,649.96, 727,101.22 and 257,425.56 is: 385,410.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,649.96 : 727,101.22 = 257,425.56 : x
  2. Step 2: Convert to fraction form
    485,649.96/727,101.22 = 257,425.56/x
  3. Step 3: Cross multiply
    485,649.96x = 727,101.22 × 257,425.56
  4. Step 4: Simplify right side
    485,649.96x = 187,174,438,735.18
  5. Step 5: Solve for x
    x = 187,174,438,735.18/485,649.96
  6. Step 6: Final answer
    x = 385,410.18

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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.