Home / 815,660.25-1,223,750.40-342,218.49

Finding the Fourth Proportional to 815,660.25, 1,223,750.40 and 342,218.49

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Solution

The fourth proportional to 815,660.25, 1,223,750.40 and 342,218.49 is: 513,436.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,660.25 : 1,223,750.40 = 342,218.49 : x
  2. Step 2: Convert to fraction form
    815,660.25/1,223,750.40 = 342,218.49/x
  3. Step 3: Cross multiply
    815,660.25x = 1,223,750.40 × 342,218.49
  4. Step 4: Simplify right side
    815,660.25x = 418,790,014,024.90
  5. Step 5: Solve for x
    x = 418,790,014,024.90/815,660.25
  6. Step 6: Final answer
    x = 513,436.83

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1.5x scale

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.