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Finding the Fourth Proportional to 511.16, 704.02 and 393.28

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Solution

The fourth proportional to 511.16, 704.02 and 393.28 is: 541.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.16 : 704.02 = 393.28 : x
  2. Step 2: Convert to fraction form
    511.16/704.02 = 393.28/x
  3. Step 3: Cross multiply
    511.16x = 704.02 × 393.28
  4. Step 4: Simplify right side
    511.16x = 276,876.99
  5. Step 5: Solve for x
    x = 276,876.99/511.16
  6. Step 6: Final answer
    x = 541.66

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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.