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Finding the Fourth Proportional to 888.45, 1,226.06 and 490.12

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Solution

The fourth proportional to 888.45, 1,226.06 and 490.12 is: 676.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.45 : 1,226.06 = 490.12 : x
  2. Step 2: Convert to fraction form
    888.45/1,226.06 = 490.12/x
  3. Step 3: Cross multiply
    888.45x = 1,226.06 × 490.12
  4. Step 4: Simplify right side
    888.45x = 600,919.29
  5. Step 5: Solve for x
    x = 600,919.29/888.45
  6. Step 6: Final answer
    x = 676.37

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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.