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Finding the Fourth Proportional to 678.92, 937.17 and 668.93

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Solution

The fourth proportional to 678.92, 937.17 and 668.93 is: 923.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.92 : 937.17 = 668.93 : x
  2. Step 2: Convert to fraction form
    678.92/937.17 = 668.93/x
  3. Step 3: Cross multiply
    678.92x = 937.17 × 668.93
  4. Step 4: Simplify right side
    678.92x = 626,896.44
  5. Step 5: Solve for x
    x = 626,896.44/678.92
  6. Step 6: Final answer
    x = 923.38

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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.