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Finding the Fourth Proportional to 485,061.88, 727,415.28 and 185,394.28

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Solution

The fourth proportional to 485,061.88, 727,415.28 and 185,394.28 is: 278,023.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,061.88 : 727,415.28 = 185,394.28 : x
  2. Step 2: Convert to fraction form
    485,061.88/727,415.28 = 185,394.28/x
  3. Step 3: Cross multiply
    485,061.88x = 727,415.28 × 185,394.28
  4. Step 4: Simplify right side
    485,061.88x = 134,858,632,096.60
  5. Step 5: Solve for x
    x = 134,858,632,096.60/485,061.88
  6. Step 6: Final answer
    x = 278,023.56

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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.