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Finding the Third Proportional to 1,319.13 and 1,988.88

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Solution

The third proportional to 1,319.13 and 1,988.88 is: 2,998.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.13 : 1,988.88 = 1,988.88 : x
  2. Step 2: Convert to fraction form
    1,319.13/1,988.88 = 1,988.88/x
  3. Step 3: Cross multiply
    1,319.13x = 1,988.88 × 1,988.88
  4. Step 4: Simplify right side
    1,319.13x = 3,955,623.77
  5. Step 5: Solve for x
    x = 3,955,623.77/1,319.13
  6. Step 6: Final answer
    x = 2,998.67

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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.