Home / 805,115.78-1,207,207.02-331,265.78

Finding the Fourth Proportional to 805,115.78, 1,207,207.02 and 331,265.78

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Solution

The fourth proportional to 805,115.78, 1,207,207.02 and 331,265.78 is: 496,706.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,115.78 : 1,207,207.02 = 331,265.78 : x
  2. Step 2: Convert to fraction form
    805,115.78/1,207,207.02 = 331,265.78/x
  3. Step 3: Cross multiply
    805,115.78x = 1,207,207.02 × 331,265.78
  4. Step 4: Simplify right side
    805,115.78x = 399,906,375,101.78
  5. Step 5: Solve for x
    x = 399,906,375,101.78/805,115.78
  6. Step 6: Final answer
    x = 496,706.67

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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.