Home / 810,471.94-1,215,917.88-431,080.40

Finding the Fourth Proportional to 810,471.94, 1,215,917.88 and 431,080.40

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Solution

The fourth proportional to 810,471.94, 1,215,917.88 and 431,080.40 is: 646,732.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,471.94 : 1,215,917.88 = 431,080.40 : x
  2. Step 2: Convert to fraction form
    810,471.94/1,215,917.88 = 431,080.40/x
  3. Step 3: Cross multiply
    810,471.94x = 1,215,917.88 × 431,080.40
  4. Step 4: Simplify right side
    810,471.94x = 524,158,363,086.08
  5. Step 5: Solve for x
    x = 524,158,363,086.08/810,471.94
  6. Step 6: Final answer
    x = 646,732.27

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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.