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Finding the Third Proportional to 1,690.13 and 1,798.13

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Solution

The third proportional to 1,690.13 and 1,798.13 is: 1,913.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.13 : 1,798.13 = 1,798.13 : x
  2. Step 2: Convert to fraction form
    1,690.13/1,798.13 = 1,798.13/x
  3. Step 3: Cross multiply
    1,690.13x = 1,798.13 × 1,798.13
  4. Step 4: Simplify right side
    1,690.13x = 3,233,253.52
  5. Step 5: Solve for x
    x = 3,233,253.52/1,690.13
  6. Step 6: Final answer
    x = 1,913.03

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Why These Related Problems?

These problems maintain the same ratio (1.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.