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Finding the Fourth Proportional to 890.85, 1,336.70 and 343.23

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Solution

The fourth proportional to 890.85, 1,336.70 and 343.23 is: 515.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.85 : 1,336.70 = 343.23 : x
  2. Step 2: Convert to fraction form
    890.85/1,336.70 = 343.23/x
  3. Step 3: Cross multiply
    890.85x = 1,336.70 × 343.23
  4. Step 4: Simplify right side
    890.85x = 458,793.82
  5. Step 5: Solve for x
    x = 458,793.82/890.85
  6. Step 6: Final answer
    x = 515.01

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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.