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Finding the Fourth Proportional to 891.43, 1,336.71 and 404.14

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Solution

The fourth proportional to 891.43, 1,336.71 and 404.14 is: 606.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.43 : 1,336.71 = 404.14 : x
  2. Step 2: Convert to fraction form
    891.43/1,336.71 = 404.14/x
  3. Step 3: Cross multiply
    891.43x = 1,336.71 × 404.14
  4. Step 4: Simplify right side
    891.43x = 540,217.98
  5. Step 5: Solve for x
    x = 540,217.98/891.43
  6. Step 6: Final answer
    x = 606.01

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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.