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Finding the Fourth Proportional to 883.38, 1,218.99 and 490.38

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Solution

The fourth proportional to 883.38, 1,218.99 and 490.38 is: 676.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.38 : 1,218.99 = 490.38 : x
  2. Step 2: Convert to fraction form
    883.38/1,218.99 = 490.38/x
  3. Step 3: Cross multiply
    883.38x = 1,218.99 × 490.38
  4. Step 4: Simplify right side
    883.38x = 597,768.32
  5. Step 5: Solve for x
    x = 597,768.32/883.38
  6. Step 6: Final answer
    x = 676.68

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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.