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Finding the Fourth Proportional to 378.36, 570.77 and 338.28

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Solution

The fourth proportional to 378.36, 570.77 and 338.28 is: 510.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.36 : 570.77 = 338.28 : x
  2. Step 2: Convert to fraction form
    378.36/570.77 = 338.28/x
  3. Step 3: Cross multiply
    378.36x = 570.77 × 338.28
  4. Step 4: Simplify right side
    378.36x = 193,078.38
  5. Step 5: Solve for x
    x = 193,078.38/378.36
  6. Step 6: Final answer
    x = 510.30

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.