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Finding the Fourth Proportional to 890.91, 1,336.37 and 343.35

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Solution

The fourth proportional to 890.91, 1,336.37 and 343.35 is: 515.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.91 : 1,336.37 = 343.35 : x
  2. Step 2: Convert to fraction form
    890.91/1,336.37 = 343.35/x
  3. Step 3: Cross multiply
    890.91x = 1,336.37 × 343.35
  4. Step 4: Simplify right side
    890.91x = 458,840.92
  5. Step 5: Solve for x
    x = 458,840.92/890.91
  6. Step 6: Final answer
    x = 515.03

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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.