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Finding the Fourth Proportional to 324,990.20, 486,534.90 and 231,678.20

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Solution

The fourth proportional to 324,990.20, 486,534.90 and 231,678.20 is: 346,839.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,990.20 : 486,534.90 = 231,678.20 : x
  2. Step 2: Convert to fraction form
    324,990.20/486,534.90 = 231,678.20/x
  3. Step 3: Cross multiply
    324,990.20x = 486,534.90 × 231,678.20
  4. Step 4: Simplify right side
    324,990.20x = 112,719,529,869.18
  5. Step 5: Solve for x
    x = 112,719,529,869.18/324,990.20
  6. Step 6: Final answer
    x = 346,839.78

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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.