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Finding the Fourth Proportional to 880.78, 1,321.17 and 295.67

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Solution

The fourth proportional to 880.78, 1,321.17 and 295.67 is: 443.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.78 : 1,321.17 = 295.67 : x
  2. Step 2: Convert to fraction form
    880.78/1,321.17 = 295.67/x
  3. Step 3: Cross multiply
    880.78x = 1,321.17 × 295.67
  4. Step 4: Simplify right side
    880.78x = 390,630.33
  5. Step 5: Solve for x
    x = 390,630.33/880.78
  6. Step 6: Final answer
    x = 443.51

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Double scale
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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.