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Finding the Fourth Proportional to 408,209.52, 612,325.80 and 112,721.52

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Solution

The fourth proportional to 408,209.52, 612,325.80 and 112,721.52 is: 169,085.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,209.52 : 612,325.80 = 112,721.52 : x
  2. Step 2: Convert to fraction form
    408,209.52/612,325.80 = 112,721.52/x
  3. Step 3: Cross multiply
    408,209.52x = 612,325.80 × 112,721.52
  4. Step 4: Simplify right side
    408,209.52x = 69,022,294,911.22
  5. Step 5: Solve for x
    x = 69,022,294,911.22/408,209.52
  6. Step 6: Final answer
    x = 169,085.46

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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.