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Finding the Fourth Proportional to 377.28, 561.96 and 318.24

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Solution

The fourth proportional to 377.28, 561.96 and 318.24 is: 474.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    377.28 : 561.96 = 318.24 : x
  2. Step 2: Convert to fraction form
    377.28/561.96 = 318.24/x
  3. Step 3: Cross multiply
    377.28x = 561.96 × 318.24
  4. Step 4: Simplify right side
    377.28x = 178,838.15
  5. Step 5: Solve for x
    x = 178,838.15/377.28
  6. Step 6: Final answer
    x = 474.02

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.