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Finding the Fourth Proportional to 324,389.19, 486,687.87 and 155,921.72

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Solution

The fourth proportional to 324,389.19, 486,687.87 and 155,921.72 is: 233,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,389.19 : 486,687.87 = 155,921.72 : x
  2. Step 2: Convert to fraction form
    324,389.19/486,687.87 = 155,921.72/x
  3. Step 3: Cross multiply
    324,389.19x = 486,687.87 × 155,921.72
  4. Step 4: Simplify right side
    324,389.19x = 75,885,207,360.10
  5. Step 5: Solve for x
    x = 75,885,207,360.10/324,389.19
  6. Step 6: Final answer
    x = 233,932.60

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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.