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Finding the Fourth Proportional to 466.19, 643.48 and 291.68

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Solution

The fourth proportional to 466.19, 643.48 and 291.68 is: 402.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.19 : 643.48 = 291.68 : x
  2. Step 2: Convert to fraction form
    466.19/643.48 = 291.68/x
  3. Step 3: Cross multiply
    466.19x = 643.48 × 291.68
  4. Step 4: Simplify right side
    466.19x = 187,686.30
  5. Step 5: Solve for x
    x = 187,686.30/466.19
  6. Step 6: Final answer
    x = 402.60

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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.