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Finding the Fourth Proportional to 511.08, 704.52 and 386.88

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Solution

The fourth proportional to 511.08, 704.52 and 386.88 is: 533.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.08 : 704.52 = 386.88 : x
  2. Step 2: Convert to fraction form
    511.08/704.52 = 386.88/x
  3. Step 3: Cross multiply
    511.08x = 704.52 × 386.88
  4. Step 4: Simplify right side
    511.08x = 272,564.70
  5. Step 5: Solve for x
    x = 272,564.70/511.08
  6. Step 6: Final answer
    x = 533.31

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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.