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Finding the Third Proportional to 368.30 and 775.20

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Solution

The third proportional to 368.30 and 775.20 is: 1,631.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.30 : 775.20 = 775.20 : x
  2. Step 2: Convert to fraction form
    368.30/775.20 = 775.20/x
  3. Step 3: Cross multiply
    368.30x = 775.20 × 775.20
  4. Step 4: Simplify right side
    368.30x = 600,927.77
  5. Step 5: Solve for x
    x = 600,927.77/368.30
  6. Step 6: Final answer
    x = 1,631.64

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.