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Finding the Third Proportional to 910.13 and 1,390.31

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Solution

The third proportional to 910.13 and 1,390.31 is: 2,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.13 : 1,390.31 = 1,390.31 : x
  2. Step 2: Convert to fraction form
    910.13/1,390.31 = 1,390.31/x
  3. Step 3: Cross multiply
    910.13x = 1,390.31 × 1,390.31
  4. Step 4: Simplify right side
    910.13x = 1,932,968.85
  5. Step 5: Solve for x
    x = 1,932,968.85/910.13
  6. Step 6: Final answer
    x = 2,123.85

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.