Home / 815,431.05-1,223,146.17-254,465.55

Finding the Fourth Proportional to 815,431.05, 1,223,146.17 and 254,465.55

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Solution

The fourth proportional to 815,431.05, 1,223,146.17 and 254,465.55 is: 381,698.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,431.05 : 1,223,146.17 = 254,465.55 : x
  2. Step 2: Convert to fraction form
    815,431.05/1,223,146.17 = 254,465.55/x
  3. Step 3: Cross multiply
    815,431.05x = 1,223,146.17 × 254,465.55
  4. Step 4: Simplify right side
    815,431.05x = 311,248,562,879.44
  5. Step 5: Solve for x
    x = 311,248,562,879.44/815,431.05
  6. Step 6: Final answer
    x = 381,698.20

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Double scale
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Similar ratio
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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.