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Finding the Fourth Proportional to 392.01, 587.78 and 148.28

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Solution

The fourth proportional to 392.01, 587.78 and 148.28 is: 222.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.01 : 587.78 = 148.28 : x
  2. Step 2: Convert to fraction form
    392.01/587.78 = 148.28/x
  3. Step 3: Cross multiply
    392.01x = 587.78 × 148.28
  4. Step 4: Simplify right side
    392.01x = 87,152.34
  5. Step 5: Solve for x
    x = 87,152.34/392.01
  6. Step 6: Final answer
    x = 222.32

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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.