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Finding the Fourth Proportional to 1,353,722.20, 1,868,006.46 and 809,747.80

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Solution

The fourth proportional to 1,353,722.20, 1,868,006.46 and 809,747.80 is: 1,117,374.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353,722.20 : 1,868,006.46 = 809,747.80 : x
  2. Step 2: Convert to fraction form
    1,353,722.20/1,868,006.46 = 809,747.80/x
  3. Step 3: Cross multiply
    1,353,722.20x = 1,868,006.46 × 809,747.80
  4. Step 4: Simplify right side
    1,353,722.20x = 1,512,614,121,370.79
  5. Step 5: Solve for x
    x = 1,512,614,121,370.79/1,353,722.20
  6. Step 6: Final answer
    x = 1,117,374.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.