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Finding the Fourth Proportional to 667.66, 920.67 and 468.67

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Solution

The fourth proportional to 667.66, 920.67 and 468.67 is: 646.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.66 : 920.67 = 468.67 : x
  2. Step 2: Convert to fraction form
    667.66/920.67 = 468.67/x
  3. Step 3: Cross multiply
    667.66x = 920.67 × 468.67
  4. Step 4: Simplify right side
    667.66x = 431,490.41
  5. Step 5: Solve for x
    x = 431,490.41/667.66
  6. Step 6: Final answer
    x = 646.27

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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.