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Finding the Fourth Proportional to 324,008.20, 485,429.10 and 264,521.80

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Solution

The fourth proportional to 324,008.20, 485,429.10 and 264,521.80 is: 396,306.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,008.20 : 485,429.10 = 264,521.80 : x
  2. Step 2: Convert to fraction form
    324,008.20/485,429.10 = 264,521.80/x
  3. Step 3: Cross multiply
    324,008.20x = 485,429.10 × 264,521.80
  4. Step 4: Simplify right side
    324,008.20x = 128,406,579,304.38
  5. Step 5: Solve for x
    x = 128,406,579,304.38/324,008.20
  6. Step 6: Final answer
    x = 396,306.57

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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.