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Finding the Fourth Proportional to 814,807.80, 1,221,866.10 and 394,212.60

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Solution

The fourth proportional to 814,807.80, 1,221,866.10 and 394,212.60 is: 591,151.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,807.80 : 1,221,866.10 = 394,212.60 : x
  2. Step 2: Convert to fraction form
    814,807.80/1,221,866.10 = 394,212.60/x
  3. Step 3: Cross multiply
    814,807.80x = 1,221,866.10 × 394,212.60
  4. Step 4: Simplify right side
    814,807.80x = 481,675,012,132.86
  5. Step 5: Solve for x
    x = 481,675,012,132.86/814,807.80
  6. Step 6: Final answer
    x = 591,151.70

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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.