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Finding the Fourth Proportional to 926.10, 1,388.33 and 349.38

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Solution

The fourth proportional to 926.10, 1,388.33 and 349.38 is: 523.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.10 : 1,388.33 = 349.38 : x
  2. Step 2: Convert to fraction form
    926.10/1,388.33 = 349.38/x
  3. Step 3: Cross multiply
    926.10x = 1,388.33 × 349.38
  4. Step 4: Simplify right side
    926.10x = 485,052.99
  5. Step 5: Solve for x
    x = 485,052.99/926.10
  6. Step 6: Final answer
    x = 523.76

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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.