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Finding the Third Proportional to 977.50 and 2,108.38

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Solution

The third proportional to 977.50 and 2,108.38 is: 4,547.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.50 : 2,108.38 = 2,108.38 : x
  2. Step 2: Convert to fraction form
    977.50/2,108.38 = 2,108.38/x
  3. Step 3: Cross multiply
    977.50x = 2,108.38 × 2,108.38
  4. Step 4: Simplify right side
    977.50x = 4,445,245.14
  5. Step 5: Solve for x
    x = 4,445,245.14/977.50
  6. Step 6: Final answer
    x = 4,547.57

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.