Home / 431,440.16-647,160.26-131,920.70

Finding the Fourth Proportional to 431,440.16, 647,160.26 and 131,920.70

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Solution

The fourth proportional to 431,440.16, 647,160.26 and 131,920.70 is: 197,881.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,440.16 : 647,160.26 = 131,920.70 : x
  2. Step 2: Convert to fraction form
    431,440.16/647,160.26 = 131,920.70/x
  3. Step 3: Cross multiply
    431,440.16x = 647,160.26 × 131,920.70
  4. Step 4: Simplify right side
    431,440.16x = 85,373,830,615.98
  5. Step 5: Solve for x
    x = 85,373,830,615.98/431,440.16
  6. Step 6: Final answer
    x = 197,881.05

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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.