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Finding the Fourth Proportional to 392.07, 587.61 and 148.35

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Solution

The fourth proportional to 392.07, 587.61 and 148.35 is: 222.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.07 : 587.61 = 148.35 : x
  2. Step 2: Convert to fraction form
    392.07/587.61 = 148.35/x
  3. Step 3: Cross multiply
    392.07x = 587.61 × 148.35
  4. Step 4: Simplify right side
    392.07x = 87,171.94
  5. Step 5: Solve for x
    x = 87,171.94/392.07
  6. Step 6: Final answer
    x = 222.34

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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.