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Finding the Fourth Proportional to 646.27, 969.39 and 235.40

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Solution

The fourth proportional to 646.27, 969.39 and 235.40 is: 353.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.27 : 969.39 = 235.40 : x
  2. Step 2: Convert to fraction form
    646.27/969.39 = 235.40/x
  3. Step 3: Cross multiply
    646.27x = 969.39 × 235.40
  4. Step 4: Simplify right side
    646.27x = 228,193.23
  5. Step 5: Solve for x
    x = 228,193.23/646.27
  6. Step 6: Final answer
    x = 353.10

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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.