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Finding the Fourth Proportional to 370.92, 556.44 and 209.64

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Solution

The fourth proportional to 370.92, 556.44 and 209.64 is: 314.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.92 : 556.44 = 209.64 : x
  2. Step 2: Convert to fraction form
    370.92/556.44 = 209.64/x
  3. Step 3: Cross multiply
    370.92x = 556.44 × 209.64
  4. Step 4: Simplify right side
    370.92x = 116,652.08
  5. Step 5: Solve for x
    x = 116,652.08/370.92
  6. Step 6: Final answer
    x = 314.49

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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.