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Finding the Fourth Proportional to 696.58, 958.82 and 688.88

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Solution

The fourth proportional to 696.58, 958.82 and 688.88 is: 948.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.58 : 958.82 = 688.88 : x
  2. Step 2: Convert to fraction form
    696.58/958.82 = 688.88/x
  3. Step 3: Cross multiply
    696.58x = 958.82 × 688.88
  4. Step 4: Simplify right side
    696.58x = 660,510.87
  5. Step 5: Solve for x
    x = 660,510.87/696.58
  6. Step 6: Final answer
    x = 948.22

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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.