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Finding the Fourth Proportional to 369.34, 550.74 and 318.30

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Solution

The fourth proportional to 369.34, 550.74 and 318.30 is: 474.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.34 : 550.74 = 318.30 : x
  2. Step 2: Convert to fraction form
    369.34/550.74 = 318.30/x
  3. Step 3: Cross multiply
    369.34x = 550.74 × 318.30
  4. Step 4: Simplify right side
    369.34x = 175,300.54
  5. Step 5: Solve for x
    x = 175,300.54/369.34
  6. Step 6: Final answer
    x = 474.63

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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.