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Finding the Fourth Proportional to 888.49, 1,226.08 and 490.15

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Solution

The fourth proportional to 888.49, 1,226.08 and 490.15 is: 676.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.49 : 1,226.08 = 490.15 : x
  2. Step 2: Convert to fraction form
    888.49/1,226.08 = 490.15/x
  3. Step 3: Cross multiply
    888.49x = 1,226.08 × 490.15
  4. Step 4: Simplify right side
    888.49x = 600,963.11
  5. Step 5: Solve for x
    x = 600,963.11/888.49
  6. Step 6: Final answer
    x = 676.39

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Double scale
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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.