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Finding the Fourth Proportional to 681.24, 934.00 and 668.95

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Solution

The fourth proportional to 681.24, 934.00 and 668.95 is: 917.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.24 : 934.00 = 668.95 : x
  2. Step 2: Convert to fraction form
    681.24/934.00 = 668.95/x
  3. Step 3: Cross multiply
    681.24x = 934.00 × 668.95
  4. Step 4: Simplify right side
    681.24x = 624,795.29
  5. Step 5: Solve for x
    x = 624,795.29/681.24
  6. Step 6: Final answer
    x = 917.14

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.