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Finding the Fourth Proportional to 883.34, 1,218.90 and 490.44

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Solution

The fourth proportional to 883.34, 1,218.90 and 490.44 is: 676.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.34 : 1,218.90 = 490.44 : x
  2. Step 2: Convert to fraction form
    883.34/1,218.90 = 490.44/x
  3. Step 3: Cross multiply
    883.34x = 1,218.90 × 490.44
  4. Step 4: Simplify right side
    883.34x = 597,794.11
  5. Step 5: Solve for x
    x = 597,794.11/883.34
  6. Step 6: Final answer
    x = 676.74

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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.