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Finding the Fourth Proportional to 429.63, 643.83 and 246.63

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Solution

The fourth proportional to 429.63, 643.83 and 246.63 is: 369.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.63 : 643.83 = 246.63 : x
  2. Step 2: Convert to fraction form
    429.63/643.83 = 246.63/x
  3. Step 3: Cross multiply
    429.63x = 643.83 × 246.63
  4. Step 4: Simplify right side
    429.63x = 158,787.79
  5. Step 5: Solve for x
    x = 158,787.79/429.63
  6. Step 6: Final answer
    x = 369.59

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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.