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Finding the Third Proportional to 400.78 and 597.80

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Solution

The third proportional to 400.78 and 597.80 is: 891.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.78 : 597.80 = 597.80 : x
  2. Step 2: Convert to fraction form
    400.78/597.80 = 597.80/x
  3. Step 3: Cross multiply
    400.78x = 597.80 × 597.80
  4. Step 4: Simplify right side
    400.78x = 357,361.10
  5. Step 5: Solve for x
    x = 357,361.10/400.78
  6. Step 6: Final answer
    x = 891.66

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.