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Finding the Fourth Proportional to 688.88, 950.66 and 378.38

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Solution

The fourth proportional to 688.88, 950.66 and 378.38 is: 522.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.88 : 950.66 = 378.38 : x
  2. Step 2: Convert to fraction form
    688.88/950.66 = 378.38/x
  3. Step 3: Cross multiply
    688.88x = 950.66 × 378.38
  4. Step 4: Simplify right side
    688.88x = 359,704.09
  5. Step 5: Solve for x
    x = 359,704.09/688.88
  6. Step 6: Final answer
    x = 522.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.