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Finding the Fourth Proportional to 819.29, 1,228.95 and 202.98

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Solution

The fourth proportional to 819.29, 1,228.95 and 202.98 is: 304.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.29 : 1,228.95 = 202.98 : x
  2. Step 2: Convert to fraction form
    819.29/1,228.95 = 202.98/x
  3. Step 3: Cross multiply
    819.29x = 1,228.95 × 202.98
  4. Step 4: Simplify right side
    819.29x = 249,452.27
  5. Step 5: Solve for x
    x = 249,452.27/819.29
  6. Step 6: Final answer
    x = 304.48

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.