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Finding the Fourth Proportional to 539.05, 808.58 and 431.52

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Solution

The fourth proportional to 539.05, 808.58 and 431.52 is: 647.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.05 : 808.58 = 431.52 : x
  2. Step 2: Convert to fraction form
    539.05/808.58 = 431.52/x
  3. Step 3: Cross multiply
    539.05x = 808.58 × 431.52
  4. Step 4: Simplify right side
    539.05x = 348,918.44
  5. Step 5: Solve for x
    x = 348,918.44/539.05
  6. Step 6: Final answer
    x = 647.28

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Similar ratio
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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.