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Finding the Fourth Proportional to 325,568.40, 487,769.40 and 278,912.40

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Solution

The fourth proportional to 325,568.40, 487,769.40 and 278,912.40 is: 417,868.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,568.40 : 487,769.40 = 278,912.40 : x
  2. Step 2: Convert to fraction form
    325,568.40/487,769.40 = 278,912.40/x
  3. Step 3: Cross multiply
    325,568.40x = 487,769.40 × 278,912.40
  4. Step 4: Simplify right side
    325,568.40x = 136,044,934,000.56
  5. Step 5: Solve for x
    x = 136,044,934,000.56/325,568.40
  6. Step 6: Final answer
    x = 417,868.98

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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.