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Finding the Third Proportional to 608.63 and 918.28

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Solution

The third proportional to 608.63 and 918.28 is: 1,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.63 : 918.28 = 918.28 : x
  2. Step 2: Convert to fraction form
    608.63/918.28 = 918.28/x
  3. Step 3: Cross multiply
    608.63x = 918.28 × 918.28
  4. Step 4: Simplify right side
    608.63x = 843,240.45
  5. Step 5: Solve for x
    x = 843,240.45/608.63
  6. Step 6: Final answer
    x = 1,385.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.