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Finding the Fourth Proportional to 429.97, 644.82 and 360.85

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Solution

The fourth proportional to 429.97, 644.82 and 360.85 is: 541.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.97 : 644.82 = 360.85 : x
  2. Step 2: Convert to fraction form
    429.97/644.82 = 360.85/x
  3. Step 3: Cross multiply
    429.97x = 644.82 × 360.85
  4. Step 4: Simplify right side
    429.97x = 232,683.30
  5. Step 5: Solve for x
    x = 232,683.30/429.97
  6. Step 6: Final answer
    x = 541.16

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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.