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Finding the Fourth Proportional to 625.79, 936.66 and 351.20

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Solution

The fourth proportional to 625.79, 936.66 and 351.20 is: 525.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.79 : 936.66 = 351.20 : x
  2. Step 2: Convert to fraction form
    625.79/936.66 = 351.20/x
  3. Step 3: Cross multiply
    625.79x = 936.66 × 351.20
  4. Step 4: Simplify right side
    625.79x = 328,954.99
  5. Step 5: Solve for x
    x = 328,954.99/625.79
  6. Step 6: Final answer
    x = 525.66

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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.