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Finding the Fourth Proportional to 350.91, 522.68 and 345.78

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Solution

The fourth proportional to 350.91, 522.68 and 345.78 is: 515.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    350.91 : 522.68 = 345.78 : x
  2. Step 2: Convert to fraction form
    350.91/522.68 = 345.78/x
  3. Step 3: Cross multiply
    350.91x = 522.68 × 345.78
  4. Step 4: Simplify right side
    350.91x = 180,730.56
  5. Step 5: Solve for x
    x = 180,730.56/350.91
  6. Step 6: Final answer
    x = 515.03

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.