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Finding the Fourth Proportional to 888.60, 1,226.22 and 490.23

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Solution

The fourth proportional to 888.60, 1,226.22 and 490.23 is: 676.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.60 : 1,226.22 = 490.23 : x
  2. Step 2: Convert to fraction form
    888.60/1,226.22 = 490.23/x
  3. Step 3: Cross multiply
    888.60x = 1,226.22 × 490.23
  4. Step 4: Simplify right side
    888.60x = 601,129.83
  5. Step 5: Solve for x
    x = 601,129.83/888.60
  6. Step 6: Final answer
    x = 676.49

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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.