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Finding the Third Proportional to 1,478.13 and 3,136.56

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Solution

The third proportional to 1,478.13 and 3,136.56 is: 6,655.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.13 : 3,136.56 = 3,136.56 : x
  2. Step 2: Convert to fraction form
    1,478.13/3,136.56 = 3,136.56/x
  3. Step 3: Cross multiply
    1,478.13x = 3,136.56 × 3,136.56
  4. Step 4: Simplify right side
    1,478.13x = 9,838,024.32
  5. Step 5: Solve for x
    x = 9,838,024.32/1,478.13
  6. Step 6: Final answer
    x = 6,655.75

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.