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Finding the Fourth Proportional to 356.59, 492.14 and 216.78

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Solution

The fourth proportional to 356.59, 492.14 and 216.78 is: 299.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.59 : 492.14 = 216.78 : x
  2. Step 2: Convert to fraction form
    356.59/492.14 = 216.78/x
  3. Step 3: Cross multiply
    356.59x = 492.14 × 216.78
  4. Step 4: Simplify right side
    356.59x = 106,686.11
  5. Step 5: Solve for x
    x = 106,686.11/356.59
  6. Step 6: Final answer
    x = 299.18

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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.