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Finding the Fourth Proportional to 388.37, 578.62 and 367.31

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Solution

The fourth proportional to 388.37, 578.62 and 367.31 is: 547.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.37 : 578.62 = 367.31 : x
  2. Step 2: Convert to fraction form
    388.37/578.62 = 367.31/x
  3. Step 3: Cross multiply
    388.37x = 578.62 × 367.31
  4. Step 4: Simplify right side
    388.37x = 212,532.91
  5. Step 5: Solve for x
    x = 212,532.91/388.37
  6. Step 6: Final answer
    x = 547.24

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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.