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Finding the Fourth Proportional to 642,761.20, 963,450.60 and 243,247.60

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Solution

The fourth proportional to 642,761.20, 963,450.60 and 243,247.60 is: 364,609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,761.20 : 963,450.60 = 243,247.60 : x
  2. Step 2: Convert to fraction form
    642,761.20/963,450.60 = 243,247.60/x
  3. Step 3: Cross multiply
    642,761.20x = 963,450.60 × 243,247.60
  4. Step 4: Simplify right side
    642,761.20x = 234,357,046,168.56
  5. Step 5: Solve for x
    x = 234,357,046,168.56/642,761.20
  6. Step 6: Final answer
    x = 364,609.82

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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.