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Finding the Fourth Proportional to 407,631.40, 612,103.20 and 307,904.20

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Solution

The fourth proportional to 407,631.40, 612,103.20 and 307,904.20 is: 462,351.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,631.40 : 612,103.20 = 307,904.20 : x
  2. Step 2: Convert to fraction form
    407,631.40/612,103.20 = 307,904.20/x
  3. Step 3: Cross multiply
    407,631.40x = 612,103.20 × 307,904.20
  4. Step 4: Simplify right side
    407,631.40x = 188,469,146,113.44
  5. Step 5: Solve for x
    x = 188,469,146,113.44/407,631.40
  6. Step 6: Final answer
    x = 462,351.88

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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.