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Finding the Fourth Proportional to 643.69, 965.58 and 232.84

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Solution

The fourth proportional to 643.69, 965.58 and 232.84 is: 349.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.69 : 965.58 = 232.84 : x
  2. Step 2: Convert to fraction form
    643.69/965.58 = 232.84/x
  3. Step 3: Cross multiply
    643.69x = 965.58 × 232.84
  4. Step 4: Simplify right side
    643.69x = 224,825.65
  5. Step 5: Solve for x
    x = 224,825.65/643.69
  6. Step 6: Final answer
    x = 349.28

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1.5x scale

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.