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Finding the Fourth Proportional to 666.22, 918.93 and 611.14

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Solution

The fourth proportional to 666.22, 918.93 and 611.14 is: 842.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.22 : 918.93 = 611.14 : x
  2. Step 2: Convert to fraction form
    666.22/918.93 = 611.14/x
  3. Step 3: Cross multiply
    666.22x = 918.93 × 611.14
  4. Step 4: Simplify right side
    666.22x = 561,594.88
  5. Step 5: Solve for x
    x = 561,594.88/666.22
  6. Step 6: Final answer
    x = 842.96

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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.