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Finding the Fourth Proportional to 651.20, 976.82 and 286.02

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Solution

The fourth proportional to 651.20, 976.82 and 286.02 is: 429.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.20 : 976.82 = 286.02 : x
  2. Step 2: Convert to fraction form
    651.20/976.82 = 286.02/x
  3. Step 3: Cross multiply
    651.20x = 976.82 × 286.02
  4. Step 4: Simplify right side
    651.20x = 279,388.63
  5. Step 5: Solve for x
    x = 279,388.63/651.20
  6. Step 6: Final answer
    x = 429.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.