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Finding the Fourth Proportional to 665.41, 918.26 and 366.66

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Solution

The fourth proportional to 665.41, 918.26 and 366.66 is: 505.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    665.41 : 918.26 = 366.66 : x
  2. Step 2: Convert to fraction form
    665.41/918.26 = 366.66/x
  3. Step 3: Cross multiply
    665.41x = 918.26 × 366.66
  4. Step 4: Simplify right side
    665.41x = 336,689.21
  5. Step 5: Solve for x
    x = 336,689.21/665.41
  6. Step 6: Final answer
    x = 505.99

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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.