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Finding the Fourth Proportional to 660.66, 911.52 and 448.36

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Solution

The fourth proportional to 660.66, 911.52 and 448.36 is: 618.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.66 : 911.52 = 448.36 : x
  2. Step 2: Convert to fraction form
    660.66/911.52 = 448.36/x
  3. Step 3: Cross multiply
    660.66x = 911.52 × 448.36
  4. Step 4: Simplify right side
    660.66x = 408,689.11
  5. Step 5: Solve for x
    x = 408,689.11/660.66
  6. Step 6: Final answer
    x = 618.61

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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.