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Finding the Third Proportional to 775.78 and 1,688.06

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Solution

The third proportional to 775.78 and 1,688.06 is: 3,673.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.78 : 1,688.06 = 1,688.06 : x
  2. Step 2: Convert to fraction form
    775.78/1,688.06 = 1,688.06/x
  3. Step 3: Cross multiply
    775.78x = 1,688.06 × 1,688.06
  4. Step 4: Simplify right side
    775.78x = 2,849,555.00
  5. Step 5: Solve for x
    x = 2,849,555.00/775.78
  6. Step 6: Final answer
    x = 3,673.14

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.