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Finding the Fourth Proportional to 369.43, 551.29 and 328.53

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Solution

The fourth proportional to 369.43, 551.29 and 328.53 is: 490.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.43 : 551.29 = 328.53 : x
  2. Step 2: Convert to fraction form
    369.43/551.29 = 328.53/x
  3. Step 3: Cross multiply
    369.43x = 551.29 × 328.53
  4. Step 4: Simplify right side
    369.43x = 181,115.30
  5. Step 5: Solve for x
    x = 181,115.30/369.43
  6. Step 6: Final answer
    x = 490.26

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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.