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Finding the Fourth Proportional to 688.80, 950.67 and 423.39

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Solution

The fourth proportional to 688.80, 950.67 and 423.39 is: 584.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.80 : 950.67 = 423.39 : x
  2. Step 2: Convert to fraction form
    688.80/950.67 = 423.39/x
  3. Step 3: Cross multiply
    688.80x = 950.67 × 423.39
  4. Step 4: Simplify right side
    688.80x = 402,504.17
  5. Step 5: Solve for x
    x = 402,504.17/688.80
  6. Step 6: Final answer
    x = 584.36

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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.