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Finding the Fourth Proportional to 646.46, 969.59 and 235.79

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Solution

The fourth proportional to 646.46, 969.59 and 235.79 is: 353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.46 : 969.59 = 235.79 : x
  2. Step 2: Convert to fraction form
    646.46/969.59 = 235.79/x
  3. Step 3: Cross multiply
    646.46x = 969.59 × 235.79
  4. Step 4: Simplify right side
    646.46x = 228,619.63
  5. Step 5: Solve for x
    x = 228,619.63/646.46
  6. Step 6: Final answer
    x = 353.65

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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.