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Finding the Fourth Proportional to 356.58, 492.13 and 216.71

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Solution

The fourth proportional to 356.58, 492.13 and 216.71 is: 299.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.58 : 492.13 = 216.71 : x
  2. Step 2: Convert to fraction form
    356.58/492.13 = 216.71/x
  3. Step 3: Cross multiply
    356.58x = 492.13 × 216.71
  4. Step 4: Simplify right side
    356.58x = 106,649.49
  5. Step 5: Solve for x
    x = 106,649.49/356.58
  6. Step 6: Final answer
    x = 299.09

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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.