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Finding the Fourth Proportional to 466.65, 643.28 and 291.69

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Solution

The fourth proportional to 466.65, 643.28 and 291.69 is: 402.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.65 : 643.28 = 291.69 : x
  2. Step 2: Convert to fraction form
    466.65/643.28 = 291.69/x
  3. Step 3: Cross multiply
    466.65x = 643.28 × 291.69
  4. Step 4: Simplify right side
    466.65x = 187,636.88
  5. Step 5: Solve for x
    x = 187,636.88/466.65
  6. Step 6: Final answer
    x = 402.09

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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.