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Finding the Fourth Proportional to 538.86, 806.67 and 355.80

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Solution

The fourth proportional to 538.86, 806.67 and 355.80 is: 532.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.86 : 806.67 = 355.80 : x
  2. Step 2: Convert to fraction form
    538.86/806.67 = 355.80/x
  3. Step 3: Cross multiply
    538.86x = 806.67 × 355.80
  4. Step 4: Simplify right side
    538.86x = 287,013.19
  5. Step 5: Solve for x
    x = 287,013.19/538.86
  6. Step 6: Final answer
    x = 532.63

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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.