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Finding the Third Proportional to 990.75 and 1,533.38

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Solution

The third proportional to 990.75 and 1,533.38 is: 2,373.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    990.75 : 1,533.38 = 1,533.38 : x
  2. Step 2: Convert to fraction form
    990.75/1,533.38 = 1,533.38/x
  3. Step 3: Cross multiply
    990.75x = 1,533.38 × 1,533.38
  4. Step 4: Simplify right side
    990.75x = 2,351,238.89
  5. Step 5: Solve for x
    x = 2,351,238.89/990.75
  6. Step 6: Final answer
    x = 2,373.19

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.