Home / 642,149.11-963,540.20-300,615.69

Finding the Fourth Proportional to 642,149.11, 963,540.20 and 300,615.69

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Solution

The fourth proportional to 642,149.11, 963,540.20 and 300,615.69 is: 451,071.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,149.11 : 963,540.20 = 300,615.69 : x
  2. Step 2: Convert to fraction form
    642,149.11/963,540.20 = 300,615.69/x
  3. Step 3: Cross multiply
    642,149.11x = 963,540.20 × 300,615.69
  4. Step 4: Simplify right side
    642,149.11x = 289,655,300,562.66
  5. Step 5: Solve for x
    x = 289,655,300,562.66/642,149.11
  6. Step 6: Final answer
    x = 451,071.72

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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.