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Finding the Fourth Proportional to 1,126,579.20, 1,689,979.20 and 327,868.80

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Solution

The fourth proportional to 1,126,579.20, 1,689,979.20 and 327,868.80 is: 491,835.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126,579.20 : 1,689,979.20 = 327,868.80 : x
  2. Step 2: Convert to fraction form
    1,126,579.20/1,689,979.20 = 327,868.80/x
  3. Step 3: Cross multiply
    1,126,579.20x = 1,689,979.20 × 327,868.80
  4. Step 4: Simplify right side
    1,126,579.20x = 554,091,452,328.96
  5. Step 5: Solve for x
    x = 554,091,452,328.96/1,126,579.20
  6. Step 6: Final answer
    x = 491,835.33

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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.