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Finding the Fourth Proportional to 388.39, 582.14 and 169.20

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Solution

The fourth proportional to 388.39, 582.14 and 169.20 is: 253.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.39 : 582.14 = 169.20 : x
  2. Step 2: Convert to fraction form
    388.39/582.14 = 169.20/x
  3. Step 3: Cross multiply
    388.39x = 582.14 × 169.20
  4. Step 4: Simplify right side
    388.39x = 98,495.18
  5. Step 5: Solve for x
    x = 98,495.18/388.39
  6. Step 6: Final answer
    x = 253.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.