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Finding the Fourth Proportional to 374.02, 561.35 and 219.72

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Solution

The fourth proportional to 374.02, 561.35 and 219.72 is: 329.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.02 : 561.35 = 219.72 : x
  2. Step 2: Convert to fraction form
    374.02/561.35 = 219.72/x
  3. Step 3: Cross multiply
    374.02x = 561.35 × 219.72
  4. Step 4: Simplify right side
    374.02x = 123,342.48
  5. Step 5: Solve for x
    x = 123,342.48/374.02
  6. Step 6: Final answer
    x = 329.78

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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.