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Finding the Fourth Proportional to 538.17, 806.78 and 355.18

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Solution

The fourth proportional to 538.17, 806.78 and 355.18 is: 532.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.17 : 806.78 = 355.18 : x
  2. Step 2: Convert to fraction form
    538.17/806.78 = 355.18/x
  3. Step 3: Cross multiply
    538.17x = 806.78 × 355.18
  4. Step 4: Simplify right side
    538.17x = 286,552.12
  5. Step 5: Solve for x
    x = 286,552.12/538.17
  6. Step 6: Final answer
    x = 532.46

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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.