Home / 821,279.28-1,231,919.12-309,040.88

Finding the Fourth Proportional to 821,279.28, 1,231,919.12 and 309,040.88

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Solution

The fourth proportional to 821,279.28, 1,231,919.12 and 309,040.88 is: 463,561.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,279.28 : 1,231,919.12 = 309,040.88 : x
  2. Step 2: Convert to fraction form
    821,279.28/1,231,919.12 = 309,040.88/x
  3. Step 3: Cross multiply
    821,279.28x = 1,231,919.12 × 309,040.88
  4. Step 4: Simplify right side
    821,279.28x = 380,713,368,933.63
  5. Step 5: Solve for x
    x = 380,713,368,933.63/821,279.28
  6. Step 6: Final answer
    x = 463,561.40

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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.