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Finding the Fourth Proportional to 643.02, 964.80 and 232.35

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Solution

The fourth proportional to 643.02, 964.80 and 232.35 is: 348.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.02 : 964.80 = 232.35 : x
  2. Step 2: Convert to fraction form
    643.02/964.80 = 232.35/x
  3. Step 3: Cross multiply
    643.02x = 964.80 × 232.35
  4. Step 4: Simplify right side
    643.02x = 224,171.28
  5. Step 5: Solve for x
    x = 224,171.28/643.02
  6. Step 6: Final answer
    x = 348.62

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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.