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Finding the Fourth Proportional to 356.17, 491.57 and 208.88

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Solution

The fourth proportional to 356.17, 491.57 and 208.88 is: 288.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.17 : 491.57 = 208.88 : x
  2. Step 2: Convert to fraction form
    356.17/491.57 = 208.88/x
  3. Step 3: Cross multiply
    356.17x = 491.57 × 208.88
  4. Step 4: Simplify right side
    356.17x = 102,678.10
  5. Step 5: Solve for x
    x = 102,678.10/356.17
  6. Step 6: Final answer
    x = 288.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.