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Finding the Fourth Proportional to 369.59, 551.12 and 318.56

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Solution

The fourth proportional to 369.59, 551.12 and 318.56 is: 475.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.59 : 551.12 = 318.56 : x
  2. Step 2: Convert to fraction form
    369.59/551.12 = 318.56/x
  3. Step 3: Cross multiply
    369.59x = 551.12 × 318.56
  4. Step 4: Simplify right side
    369.59x = 175,560.44
  5. Step 5: Solve for x
    x = 175,560.44/369.59
  6. Step 6: Final answer
    x = 475.02

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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.