Home / 718,716.50-991,811.39-396,419.68

Finding the Fourth Proportional to 718,716.50, 991,811.39 and 396,419.68

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Solution

The fourth proportional to 718,716.50, 991,811.39 and 396,419.68 is: 547,049.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,716.50 : 991,811.39 = 396,419.68 : x
  2. Step 2: Convert to fraction form
    718,716.50/991,811.39 = 396,419.68/x
  3. Step 3: Cross multiply
    718,716.50x = 991,811.39 × 396,419.68
  4. Step 4: Simplify right side
    718,716.50x = 393,173,547,522.88
  5. Step 5: Solve for x
    x = 393,173,547,522.88/718,716.50
  6. Step 6: Final answer
    x = 547,049.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.