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Finding the Fourth Proportional to 353,442.60, 530,163.90 and 327,781.80

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Solution

The fourth proportional to 353,442.60, 530,163.90 and 327,781.80 is: 491,672.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,442.60 : 530,163.90 = 327,781.80 : x
  2. Step 2: Convert to fraction form
    353,442.60/530,163.90 = 327,781.80/x
  3. Step 3: Cross multiply
    353,442.60x = 530,163.90 × 327,781.80
  4. Step 4: Simplify right side
    353,442.60x = 173,778,077,437.02
  5. Step 5: Solve for x
    x = 173,778,077,437.02/353,442.60
  6. Step 6: Final answer
    x = 491,672.70

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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.