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Finding the Fourth Proportional to 681.74, 945.35 and 658.65

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Solution

The fourth proportional to 681.74, 945.35 and 658.65 is: 913.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.74 : 945.35 = 658.65 : x
  2. Step 2: Convert to fraction form
    681.74/945.35 = 658.65/x
  3. Step 3: Cross multiply
    681.74x = 945.35 × 658.65
  4. Step 4: Simplify right side
    681.74x = 622,651.48
  5. Step 5: Solve for x
    x = 622,651.48/681.74
  6. Step 6: Final answer
    x = 913.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.