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Finding the Fourth Proportional to 646.26, 969.25 and 213.45

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Solution

The fourth proportional to 646.26, 969.25 and 213.45 is: 320.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.26 : 969.25 = 213.45 : x
  2. Step 2: Convert to fraction form
    646.26/969.25 = 213.45/x
  3. Step 3: Cross multiply
    646.26x = 969.25 × 213.45
  4. Step 4: Simplify right side
    646.26x = 206,886.41
  5. Step 5: Solve for x
    x = 206,886.41/646.26
  6. Step 6: Final answer
    x = 320.13

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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.