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Finding the Third Proportional to 979.50 and 1,556

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Solution

The third proportional to 979.50 and 1,556 is: 2,471.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.50 : 1,556 = 1,556 : x
  2. Step 2: Convert to fraction form
    979.50/1,556 = 1,556/x
  3. Step 3: Cross multiply
    979.50x = 1,556 × 1,556
  4. Step 4: Simplify right side
    979.50x = 2,421,136
  5. Step 5: Solve for x
    x = 2,421,136/979.50
  6. Step 6: Final answer
    x = 2,471.81

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.