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Finding the Fourth Proportional to 967.62, 1,335.78 and 688.44

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Solution

The fourth proportional to 967.62, 1,335.78 and 688.44 is: 950.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.62 : 1,335.78 = 688.44 : x
  2. Step 2: Convert to fraction form
    967.62/1,335.78 = 688.44/x
  3. Step 3: Cross multiply
    967.62x = 1,335.78 × 688.44
  4. Step 4: Simplify right side
    967.62x = 919,604.38
  5. Step 5: Solve for x
    x = 919,604.38/967.62
  6. Step 6: Final answer
    x = 950.38

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1.5x scale

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.