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Finding the Fourth Proportional to 888.86, 1,226.70 and 667.41

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Solution

The fourth proportional to 888.86, 1,226.70 and 667.41 is: 921.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.86 : 1,226.70 = 667.41 : x
  2. Step 2: Convert to fraction form
    888.86/1,226.70 = 667.41/x
  3. Step 3: Cross multiply
    888.86x = 1,226.70 × 667.41
  4. Step 4: Simplify right side
    888.86x = 818,711.85
  5. Step 5: Solve for x
    x = 818,711.85/888.86
  6. Step 6: Final answer
    x = 921.09

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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.