Home / 810,473.27-1,215,709.90-311,720.63

Finding the Fourth Proportional to 810,473.27, 1,215,709.90 and 311,720.63

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Solution

The fourth proportional to 810,473.27, 1,215,709.90 and 311,720.63 is: 467,580.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,473.27 : 1,215,709.90 = 311,720.63 : x
  2. Step 2: Convert to fraction form
    810,473.27/1,215,709.90 = 311,720.63/x
  3. Step 3: Cross multiply
    810,473.27x = 1,215,709.90 × 311,720.63
  4. Step 4: Simplify right side
    810,473.27x = 378,961,849,067.39
  5. Step 5: Solve for x
    x = 378,961,849,067.39/810,473.27
  6. Step 6: Final answer
    x = 467,580.94

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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.