Home / 815,618.70-1,223,865.45-342,351.90

Finding the Fourth Proportional to 815,618.70, 1,223,865.45 and 342,351.90

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Solution

The fourth proportional to 815,618.70, 1,223,865.45 and 342,351.90 is: 513,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,618.70 : 1,223,865.45 = 342,351.90 : x
  2. Step 2: Convert to fraction form
    815,618.70/1,223,865.45 = 342,351.90/x
  3. Step 3: Cross multiply
    815,618.70x = 1,223,865.45 × 342,351.90
  4. Step 4: Simplify right side
    815,618.70x = 418,992,662,151.86
  5. Step 5: Solve for x
    x = 418,992,662,151.86/815,618.70
  6. Step 6: Final answer
    x = 513,711.45

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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.