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Finding the Fourth Proportional to 660.11, 984.36 and 613.94

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Solution

The fourth proportional to 660.11, 984.36 and 613.94 is: 915.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.11 : 984.36 = 613.94 : x
  2. Step 2: Convert to fraction form
    660.11/984.36 = 613.94/x
  3. Step 3: Cross multiply
    660.11x = 984.36 × 613.94
  4. Step 4: Simplify right side
    660.11x = 604,334.91
  5. Step 5: Solve for x
    x = 604,334.91/660.11
  6. Step 6: Final answer
    x = 915.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.