Home / 811,716.62-1,120,157.78-449,133.89

Finding the Fourth Proportional to 811,716.62, 1,120,157.78 and 449,133.89

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Solution

The fourth proportional to 811,716.62, 1,120,157.78 and 449,133.89 is: 619,798.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,716.62 : 1,120,157.78 = 449,133.89 : x
  2. Step 2: Convert to fraction form
    811,716.62/1,120,157.78 = 449,133.89/x
  3. Step 3: Cross multiply
    811,716.62x = 1,120,157.78 × 449,133.89
  4. Step 4: Simplify right side
    811,716.62x = 503,100,813,298.71
  5. Step 5: Solve for x
    x = 503,100,813,298.71/811,716.62
  6. Step 6: Final answer
    x = 619,798.59

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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.