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Finding the Fourth Proportional to 660.94, 912.13 and 381.24

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Solution

The fourth proportional to 660.94, 912.13 and 381.24 is: 526.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.94 : 912.13 = 381.24 : x
  2. Step 2: Convert to fraction form
    660.94/912.13 = 381.24/x
  3. Step 3: Cross multiply
    660.94x = 912.13 × 381.24
  4. Step 4: Simplify right side
    660.94x = 347,733.97
  5. Step 5: Solve for x
    x = 347,733.97/660.94
  6. Step 6: Final answer
    x = 526.12

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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.