Home / 815,639.20-1,223,896.20-342,372.40

Finding the Fourth Proportional to 815,639.20, 1,223,896.20 and 342,372.40

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Solution

The fourth proportional to 815,639.20, 1,223,896.20 and 342,372.40 is: 513,742.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,639.20 : 1,223,896.20 = 342,372.40 : x
  2. Step 2: Convert to fraction form
    815,639.20/1,223,896.20 = 342,372.40/x
  3. Step 3: Cross multiply
    815,639.20x = 1,223,896.20 × 342,372.40
  4. Step 4: Simplify right side
    815,639.20x = 419,028,279,344.88
  5. Step 5: Solve for x
    x = 419,028,279,344.88/815,639.20
  6. Step 6: Final answer
    x = 513,742.20

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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.