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Finding the Fourth Proportional to 408,540.30, 612,810.45 and 124,230.30

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Solution

The fourth proportional to 408,540.30, 612,810.45 and 124,230.30 is: 186,345.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,540.30 : 612,810.45 = 124,230.30 : x
  2. Step 2: Convert to fraction form
    408,540.30/612,810.45 = 124,230.30/x
  3. Step 3: Cross multiply
    408,540.30x = 612,810.45 × 124,230.30
  4. Step 4: Simplify right side
    408,540.30x = 76,129,626,046.64
  5. Step 5: Solve for x
    x = 76,129,626,046.64/408,540.30
  6. Step 6: Final answer
    x = 186,345.45

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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.