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Finding the Fourth Proportional to 666.20, 918.06 and 547.76

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Solution

The fourth proportional to 666.20, 918.06 and 547.76 is: 754.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.20 : 918.06 = 547.76 : x
  2. Step 2: Convert to fraction form
    666.20/918.06 = 547.76/x
  3. Step 3: Cross multiply
    666.20x = 918.06 × 547.76
  4. Step 4: Simplify right side
    666.20x = 502,876.55
  5. Step 5: Solve for x
    x = 502,876.55/666.20
  6. Step 6: Final answer
    x = 754.84

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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.