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Finding the Fourth Proportional to 646.24, 969.20 and 235.30

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Solution

The fourth proportional to 646.24, 969.20 and 235.30 is: 352.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.24 : 969.20 = 235.30 : x
  2. Step 2: Convert to fraction form
    646.24/969.20 = 235.30/x
  3. Step 3: Cross multiply
    646.24x = 969.20 × 235.30
  4. Step 4: Simplify right side
    646.24x = 228,052.76
  5. Step 5: Solve for x
    x = 228,052.76/646.24
  6. Step 6: Final answer
    x = 352.89

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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.