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Finding the Fourth Proportional to 331,426.80, 497,140.20 and 131,680.80

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Solution

The fourth proportional to 331,426.80, 497,140.20 and 131,680.80 is: 197,521.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,426.80 : 497,140.20 = 131,680.80 : x
  2. Step 2: Convert to fraction form
    331,426.80/497,140.20 = 131,680.80/x
  3. Step 3: Cross multiply
    331,426.80x = 497,140.20 × 131,680.80
  4. Step 4: Simplify right side
    331,426.80x = 65,463,819,248.16
  5. Step 5: Solve for x
    x = 65,463,819,248.16/331,426.80
  6. Step 6: Final answer
    x = 197,521.20

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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.