Home / 813,104.88-1,219,851.12-280,630.56

Finding the Fourth Proportional to 813,104.88, 1,219,851.12 and 280,630.56

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Solution

The fourth proportional to 813,104.88, 1,219,851.12 and 280,630.56 is: 421,012.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,104.88 : 1,219,851.12 = 280,630.56 : x
  2. Step 2: Convert to fraction form
    813,104.88/1,219,851.12 = 280,630.56/x
  3. Step 3: Cross multiply
    813,104.88x = 1,219,851.12 × 280,630.56
  4. Step 4: Simplify right side
    813,104.88x = 342,327,502,922.23
  5. Step 5: Solve for x
    x = 342,327,502,922.23/813,104.88
  6. Step 6: Final answer
    x = 421,012.73

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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.