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Finding the Fourth Proportional to 880.94, 1,321.62 and 394.28

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Solution

The fourth proportional to 880.94, 1,321.62 and 394.28 is: 591.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.94 : 1,321.62 = 394.28 : x
  2. Step 2: Convert to fraction form
    880.94/1,321.62 = 394.28/x
  3. Step 3: Cross multiply
    880.94x = 1,321.62 × 394.28
  4. Step 4: Simplify right side
    880.94x = 521,088.33
  5. Step 5: Solve for x
    x = 521,088.33/880.94
  6. Step 6: Final answer
    x = 591.51

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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.