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Finding the Fourth Proportional to 442,419.20, 663,628.80 and 255,795.20

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Solution

The fourth proportional to 442,419.20, 663,628.80 and 255,795.20 is: 383,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,419.20 : 663,628.80 = 255,795.20 : x
  2. Step 2: Convert to fraction form
    442,419.20/663,628.80 = 255,795.20/x
  3. Step 3: Cross multiply
    442,419.20x = 663,628.80 × 255,795.20
  4. Step 4: Simplify right side
    442,419.20x = 169,753,061,621.76
  5. Step 5: Solve for x
    x = 169,753,061,621.76/442,419.20
  6. Step 6: Final answer
    x = 383,692.80

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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.