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Finding the Fourth Proportional to 803,212.80, 1,204,819.20 and 790,771.20

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Solution

The fourth proportional to 803,212.80, 1,204,819.20 and 790,771.20 is: 1,186,156.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    803,212.80 : 1,204,819.20 = 790,771.20 : x
  2. Step 2: Convert to fraction form
    803,212.80/1,204,819.20 = 790,771.20/x
  3. Step 3: Cross multiply
    803,212.80x = 1,204,819.20 × 790,771.20
  4. Step 4: Simplify right side
    803,212.80x = 952,736,324,567.04
  5. Step 5: Solve for x
    x = 952,736,324,567.04/803,212.80
  6. Step 6: Final answer
    x = 1,186,156.80

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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.