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Finding the Fourth Proportional to 815,800.88, 1,223,874.66 and 342,213.32

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Solution

The fourth proportional to 815,800.88, 1,223,874.66 and 342,213.32 is: 513,392.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,800.88 : 1,223,874.66 = 342,213.32 : x
  2. Step 2: Convert to fraction form
    815,800.88/1,223,874.66 = 342,213.32/x
  3. Step 3: Cross multiply
    815,800.88x = 1,223,874.66 × 342,213.32
  4. Step 4: Simplify right side
    815,800.88x = 418,826,210,662.47
  5. Step 5: Solve for x
    x = 418,826,210,662.47/815,800.88
  6. Step 6: Final answer
    x = 513,392.69

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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.