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Finding the Fourth Proportional to 388.16, 579.12 and 369.80

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Solution

The fourth proportional to 388.16, 579.12 and 369.80 is: 551.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.16 : 579.12 = 369.80 : x
  2. Step 2: Convert to fraction form
    388.16/579.12 = 369.80/x
  3. Step 3: Cross multiply
    388.16x = 579.12 × 369.80
  4. Step 4: Simplify right side
    388.16x = 214,158.58
  5. Step 5: Solve for x
    x = 214,158.58/388.16
  6. Step 6: Final answer
    x = 551.73

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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.