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Finding the Fourth Proportional to 468.89, 647.25 and 291.88

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Solution

The fourth proportional to 468.89, 647.25 and 291.88 is: 402.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.89 : 647.25 = 291.88 : x
  2. Step 2: Convert to fraction form
    468.89/647.25 = 291.88/x
  3. Step 3: Cross multiply
    468.89x = 647.25 × 291.88
  4. Step 4: Simplify right side
    468.89x = 188,919.33
  5. Step 5: Solve for x
    x = 188,919.33/468.89
  6. Step 6: Final answer
    x = 402.91

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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.