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Finding the Fourth Proportional to 442,353.80, 664,221.90 and 255,729.80

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Solution

The fourth proportional to 442,353.80, 664,221.90 and 255,729.80 is: 383,994.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,353.80 : 664,221.90 = 255,729.80 : x
  2. Step 2: Convert to fraction form
    442,353.80/664,221.90 = 255,729.80/x
  3. Step 3: Cross multiply
    442,353.80x = 664,221.90 × 255,729.80
  4. Step 4: Simplify right side
    442,353.80x = 169,861,333,642.62
  5. Step 5: Solve for x
    x = 169,861,333,642.62/442,353.80
  6. Step 6: Final answer
    x = 383,994.29

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1.5x scale

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.