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Finding the Fourth Proportional to 696.92, 1,048.26 and 630.68

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Solution

The fourth proportional to 696.92, 1,048.26 and 630.68 is: 948.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    696.92 : 1,048.26 = 630.68 : x
  2. Step 2: Convert to fraction form
    696.92/1,048.26 = 630.68/x
  3. Step 3: Cross multiply
    696.92x = 1,048.26 × 630.68
  4. Step 4: Simplify right side
    696.92x = 661,116.62
  5. Step 5: Solve for x
    x = 661,116.62/696.92
  6. Step 6: Final answer
    x = 948.63

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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.