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Finding the Fourth Proportional to 388.01, 582.01 and 128.03

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Solution

The fourth proportional to 388.01, 582.01 and 128.03 is: 192.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.01 : 582.01 = 128.03 : x
  2. Step 2: Convert to fraction form
    388.01/582.01 = 128.03/x
  3. Step 3: Cross multiply
    388.01x = 582.01 × 128.03
  4. Step 4: Simplify right side
    388.01x = 74,511.51
  5. Step 5: Solve for x
    x = 74,511.51/388.01
  6. Step 6: Final answer
    x = 192.03

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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.