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Finding the Fourth Proportional to 883.25, 1,218.89 and 490.30

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Solution

The fourth proportional to 883.25, 1,218.89 and 490.30 is: 676.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.25 : 1,218.89 = 490.30 : x
  2. Step 2: Convert to fraction form
    883.25/1,218.89 = 490.30/x
  3. Step 3: Cross multiply
    883.25x = 1,218.89 × 490.30
  4. Step 4: Simplify right side
    883.25x = 597,621.77
  5. Step 5: Solve for x
    x = 597,621.77/883.25
  6. Step 6: Final answer
    x = 676.62

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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.