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Finding the Fourth Proportional to 666.11, 918.33 and 466.67

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Solution

The fourth proportional to 666.11, 918.33 and 466.67 is: 643.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.11 : 918.33 = 466.67 : x
  2. Step 2: Convert to fraction form
    666.11/918.33 = 466.67/x
  3. Step 3: Cross multiply
    666.11x = 918.33 × 466.67
  4. Step 4: Simplify right side
    666.11x = 428,552.47
  5. Step 5: Solve for x
    x = 428,552.47/666.11
  6. Step 6: Final answer
    x = 643.37

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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.