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Finding the Fourth Proportional to 408,445.12, 612,213.66 and 308,280.52

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Solution

The fourth proportional to 408,445.12, 612,213.66 and 308,280.52 is: 462,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,445.12 : 612,213.66 = 308,280.52 : x
  2. Step 2: Convert to fraction form
    408,445.12/612,213.66 = 308,280.52/x
  3. Step 3: Cross multiply
    408,445.12x = 612,213.66 × 308,280.52
  4. Step 4: Simplify right side
    408,445.12x = 188,733,545,455.90
  5. Step 5: Solve for x
    x = 188,733,545,455.90/408,445.12
  6. Step 6: Final answer
    x = 462,078.10

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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.