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Finding the Fourth Proportional to 699.78, 965.71 and 401.00

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Solution

The fourth proportional to 699.78, 965.71 and 401.00 is: 553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.78 : 965.71 = 401.00 : x
  2. Step 2: Convert to fraction form
    699.78/965.71 = 401.00/x
  3. Step 3: Cross multiply
    699.78x = 965.71 × 401.00
  4. Step 4: Simplify right side
    699.78x = 387,245.38
  5. Step 5: Solve for x
    x = 387,245.38/699.78
  6. Step 6: Final answer
    x = 553.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.