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Finding the Fourth Proportional to 397,324.80, 595,987.20 and 131,126.40

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Solution

The fourth proportional to 397,324.80, 595,987.20 and 131,126.40 is: 196,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,324.80 : 595,987.20 = 131,126.40 : x
  2. Step 2: Convert to fraction form
    397,324.80/595,987.20 = 131,126.40/x
  3. Step 3: Cross multiply
    397,324.80x = 595,987.20 × 131,126.40
  4. Step 4: Simplify right side
    397,324.80x = 78,149,655,982.08
  5. Step 5: Solve for x
    x = 78,149,655,982.08/397,324.80
  6. Step 6: Final answer
    x = 196,689.60

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1.5x scale

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.