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Finding the Fourth Proportional to 666.06, 917.61 and 549.42

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Solution

The fourth proportional to 666.06, 917.61 and 549.42 is: 756.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.06 : 917.61 = 549.42 : x
  2. Step 2: Convert to fraction form
    666.06/917.61 = 549.42/x
  3. Step 3: Cross multiply
    666.06x = 917.61 × 549.42
  4. Step 4: Simplify right side
    666.06x = 504,153.29
  5. Step 5: Solve for x
    x = 504,153.29/666.06
  6. Step 6: Final answer
    x = 756.92

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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.