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Finding the Fourth Proportional to 408,444.12, 612,212.16 and 308,279.52

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Solution

The fourth proportional to 408,444.12, 612,212.16 and 308,279.52 is: 462,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,444.12 : 612,212.16 = 308,279.52 : x
  2. Step 2: Convert to fraction form
    408,444.12/612,212.16 = 308,279.52/x
  3. Step 3: Cross multiply
    408,444.12x = 612,212.16 × 308,279.52
  4. Step 4: Simplify right side
    408,444.12x = 188,732,470,822.96
  5. Step 5: Solve for x
    x = 188,732,470,822.96/408,444.12
  6. Step 6: Final answer
    x = 462,076.60

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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.