Home / 815,037.05-1,222,516.13-309,558.57

Finding the Fourth Proportional to 815,037.05, 1,222,516.13 and 309,558.57

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Solution

The fourth proportional to 815,037.05, 1,222,516.13 and 309,558.57 is: 464,322.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,037.05 : 1,222,516.13 = 309,558.57 : x
  2. Step 2: Convert to fraction form
    815,037.05/1,222,516.13 = 309,558.57/x
  3. Step 3: Cross multiply
    815,037.05x = 1,222,516.13 × 309,558.57
  4. Step 4: Simplify right side
    815,037.05x = 378,440,343,456.94
  5. Step 5: Solve for x
    x = 378,440,343,456.94/815,037.05
  6. Step 6: Final answer
    x = 464,322.87

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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.