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Finding the Fourth Proportional to 660.68, 911.88 and 412.19

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Solution

The fourth proportional to 660.68, 911.88 and 412.19 is: 568.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.68 : 911.88 = 412.19 : x
  2. Step 2: Convert to fraction form
    660.68/911.88 = 412.19/x
  3. Step 3: Cross multiply
    660.68x = 911.88 × 412.19
  4. Step 4: Simplify right side
    660.68x = 375,863.26
  5. Step 5: Solve for x
    x = 375,863.26/660.68
  6. Step 6: Final answer
    x = 568.91

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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.