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Finding the Fourth Proportional to 539.26, 808.90 and 477.70

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Solution

The fourth proportional to 539.26, 808.90 and 477.70 is: 716.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.26 : 808.90 = 477.70 : x
  2. Step 2: Convert to fraction form
    539.26/808.90 = 477.70/x
  3. Step 3: Cross multiply
    539.26x = 808.90 × 477.70
  4. Step 4: Simplify right side
    539.26x = 386,411.53
  5. Step 5: Solve for x
    x = 386,411.53/539.26
  6. Step 6: Final answer
    x = 716.56

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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.