Home / 686,849.72-1,025,221.66-638,716.28

Finding the Fourth Proportional to 686,849.72, 1,025,221.66 and 638,716.28

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Solution

The fourth proportional to 686,849.72, 1,025,221.66 and 638,716.28 is: 953,375.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,849.72 : 1,025,221.66 = 638,716.28 : x
  2. Step 2: Convert to fraction form
    686,849.72/1,025,221.66 = 638,716.28/x
  3. Step 3: Cross multiply
    686,849.72x = 1,025,221.66 × 638,716.28
  4. Step 4: Simplify right side
    686,849.72x = 654,825,764,850.63
  5. Step 5: Solve for x
    x = 654,825,764,850.63/686,849.72
  6. Step 6: Final answer
    x = 953,375.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.