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Finding the Third Proportional to 646.42 and 913.94

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Solution

The third proportional to 646.42 and 913.94 is: 1,292.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.42 : 913.94 = 913.94 : x
  2. Step 2: Convert to fraction form
    646.42/913.94 = 913.94/x
  3. Step 3: Cross multiply
    646.42x = 913.94 × 913.94
  4. Step 4: Simplify right side
    646.42x = 835,285.32
  5. Step 5: Solve for x
    x = 835,285.32/646.42
  6. Step 6: Final answer
    x = 1,292.18

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.