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Finding the Fourth Proportional to 356.70, 492.06 and 209.32

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Solution

The fourth proportional to 356.70, 492.06 and 209.32 is: 288.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.70 : 492.06 = 209.32 : x
  2. Step 2: Convert to fraction form
    356.70/492.06 = 209.32/x
  3. Step 3: Cross multiply
    356.70x = 492.06 × 209.32
  4. Step 4: Simplify right side
    356.70x = 102,998.00
  5. Step 5: Solve for x
    x = 102,998.00/356.70
  6. Step 6: Final answer
    x = 288.75

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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.