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Finding the Fourth Proportional to 2,656,998.40, 3,984,979.20 and 859,446.40

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Solution

The fourth proportional to 2,656,998.40, 3,984,979.20 and 859,446.40 is: 1,289,001.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656,998.40 : 3,984,979.20 = 859,446.40 : x
  2. Step 2: Convert to fraction form
    2,656,998.40/3,984,979.20 = 859,446.40/x
  3. Step 3: Cross multiply
    2,656,998.40x = 3,984,979.20 × 859,446.40
  4. Step 4: Simplify right side
    2,656,998.40x = 3,424,876,027,514.88
  5. Step 5: Solve for x
    x = 3,424,876,027,514.88/2,656,998.40
  6. Step 6: Final answer
    x = 1,289,001.92

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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.