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Finding the Fourth Proportional to 427,951.20, 641,635.20 and 203,419.20

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Solution

The fourth proportional to 427,951.20, 641,635.20 and 203,419.20 is: 304,990.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,951.20 : 641,635.20 = 203,419.20 : x
  2. Step 2: Convert to fraction form
    427,951.20/641,635.20 = 203,419.20/x
  3. Step 3: Cross multiply
    427,951.20x = 641,635.20 × 203,419.20
  4. Step 4: Simplify right side
    427,951.20x = 130,520,919,075.84
  5. Step 5: Solve for x
    x = 130,520,919,075.84/427,951.20
  6. Step 6: Final answer
    x = 304,990.19

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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.