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Finding the Fourth Proportional to 408,034.20, 611,322.30 and 197,207.40

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Solution

The fourth proportional to 408,034.20, 611,322.30 and 197,207.40 is: 295,458.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,034.20 : 611,322.30 = 197,207.40 : x
  2. Step 2: Convert to fraction form
    408,034.20/611,322.30 = 197,207.40/x
  3. Step 3: Cross multiply
    408,034.20x = 611,322.30 × 197,207.40
  4. Step 4: Simplify right side
    408,034.20x = 120,557,281,345.02
  5. Step 5: Solve for x
    x = 120,557,281,345.02/408,034.20
  6. Step 6: Final answer
    x = 295,458.77

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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.