Home / 787,634.28-1,086,263.46-665,716.32

Finding the Fourth Proportional to 787,634.28, 1,086,263.46 and 665,716.32

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Solution

The fourth proportional to 787,634.28, 1,086,263.46 and 665,716.32 is: 918,120.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,634.28 : 1,086,263.46 = 665,716.32 : x
  2. Step 2: Convert to fraction form
    787,634.28/1,086,263.46 = 665,716.32/x
  3. Step 3: Cross multiply
    787,634.28x = 1,086,263.46 × 665,716.32
  4. Step 4: Simplify right side
    787,634.28x = 723,143,313,141.67
  5. Step 5: Solve for x
    x = 723,143,313,141.67/787,634.28
  6. Step 6: Final answer
    x = 918,120.67

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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.