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Finding the Fourth Proportional to 890.66, 1,335.99 and 343.10

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Solution

The fourth proportional to 890.66, 1,335.99 and 343.10 is: 514.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.66 : 1,335.99 = 343.10 : x
  2. Step 2: Convert to fraction form
    890.66/1,335.99 = 343.10/x
  3. Step 3: Cross multiply
    890.66x = 1,335.99 × 343.10
  4. Step 4: Simplify right side
    890.66x = 458,378.17
  5. Step 5: Solve for x
    x = 458,378.17/890.66
  6. Step 6: Final answer
    x = 514.65

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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.