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Finding the Fourth Proportional to 646.37, 969.56 and 159.42

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Solution

The fourth proportional to 646.37, 969.56 and 159.42 is: 239.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.37 : 969.56 = 159.42 : x
  2. Step 2: Convert to fraction form
    646.37/969.56 = 159.42/x
  3. Step 3: Cross multiply
    646.37x = 969.56 × 159.42
  4. Step 4: Simplify right side
    646.37x = 154,567.74
  5. Step 5: Solve for x
    x = 154,567.74/646.37
  6. Step 6: Final answer
    x = 239.13

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Double scale
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Similar ratio
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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.