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Finding the Fourth Proportional to 880.78, 1,321.24 and 295.64

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Solution

The fourth proportional to 880.78, 1,321.24 and 295.64 is: 443.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.78 : 1,321.24 = 295.64 : x
  2. Step 2: Convert to fraction form
    880.78/1,321.24 = 295.64/x
  3. Step 3: Cross multiply
    880.78x = 1,321.24 × 295.64
  4. Step 4: Simplify right side
    880.78x = 390,611.39
  5. Step 5: Solve for x
    x = 390,611.39/880.78
  6. Step 6: Final answer
    x = 443.48

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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.