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Finding the Fourth Proportional to 316,542.20, 474,860.22 and 91,904.48

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Solution

The fourth proportional to 316,542.20, 474,860.22 and 91,904.48 is: 137,870.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,542.20 : 474,860.22 = 91,904.48 : x
  2. Step 2: Convert to fraction form
    316,542.20/474,860.22 = 91,904.48/x
  3. Step 3: Cross multiply
    316,542.20x = 474,860.22 × 91,904.48
  4. Step 4: Simplify right side
    316,542.20x = 43,641,781,591.79
  5. Step 5: Solve for x
    x = 43,641,781,591.79/316,542.20
  6. Step 6: Final answer
    x = 137,870.34

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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.