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Finding the Fourth Proportional to 891.17, 1,336.38 and 306.23

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Solution

The fourth proportional to 891.17, 1,336.38 and 306.23 is: 459.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.17 : 1,336.38 = 306.23 : x
  2. Step 2: Convert to fraction form
    891.17/1,336.38 = 306.23/x
  3. Step 3: Cross multiply
    891.17x = 1,336.38 × 306.23
  4. Step 4: Simplify right side
    891.17x = 409,242.22
  5. Step 5: Solve for x
    x = 409,242.22/891.17
  6. Step 6: Final answer
    x = 459.22

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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.