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Finding the Fourth Proportional to 511.05, 765.34 and 291.01

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Solution

The fourth proportional to 511.05, 765.34 and 291.01 is: 435.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.05 : 765.34 = 291.01 : x
  2. Step 2: Convert to fraction form
    511.05/765.34 = 291.01/x
  3. Step 3: Cross multiply
    511.05x = 765.34 × 291.01
  4. Step 4: Simplify right side
    511.05x = 222,721.59
  5. Step 5: Solve for x
    x = 222,721.59/511.05
  6. Step 6: Final answer
    x = 435.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.