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Finding the Fourth Proportional to 408,575.28, 612,090.20 and 231,209.60

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Solution

The fourth proportional to 408,575.28, 612,090.20 and 231,209.60 is: 346,377.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,575.28 : 612,090.20 = 231,209.60 : x
  2. Step 2: Convert to fraction form
    408,575.28/612,090.20 = 231,209.60/x
  3. Step 3: Cross multiply
    408,575.28x = 612,090.20 × 231,209.60
  4. Step 4: Simplify right side
    408,575.28x = 141,521,130,305.92
  5. Step 5: Solve for x
    x = 141,521,130,305.92/408,575.28
  6. Step 6: Final answer
    x = 346,377.12

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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.