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Finding the Fourth Proportional to 442,978.80, 611,098.20 and 321,932.40

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Solution

The fourth proportional to 442,978.80, 611,098.20 and 321,932.40 is: 444,112.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,978.80 : 611,098.20 = 321,932.40 : x
  2. Step 2: Convert to fraction form
    442,978.80/611,098.20 = 321,932.40/x
  3. Step 3: Cross multiply
    442,978.80x = 611,098.20 × 321,932.40
  4. Step 4: Simplify right side
    442,978.80x = 196,732,310,161.68
  5. Step 5: Solve for x
    x = 196,732,310,161.68/442,978.80
  6. Step 6: Final answer
    x = 444,112.25

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1.5x scale

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.