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Finding the Fourth Proportional to 431,672.40, 648,286.20 and 417,675.60

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Solution

The fourth proportional to 431,672.40, 648,286.20 and 417,675.60 is: 627,265.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,672.40 : 648,286.20 = 417,675.60 : x
  2. Step 2: Convert to fraction form
    431,672.40/648,286.20 = 417,675.60/x
  3. Step 3: Cross multiply
    431,672.40x = 648,286.20 × 417,675.60
  4. Step 4: Simplify right side
    431,672.40x = 270,773,327,556.72
  5. Step 5: Solve for x
    x = 270,773,327,556.72/431,672.40
  6. Step 6: Final answer
    x = 627,265.79

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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.