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Finding the Fourth Proportional to 392.04, 587.86 and 172.58

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Solution

The fourth proportional to 392.04, 587.86 and 172.58 is: 258.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    392.04 : 587.86 = 172.58 : x
  2. Step 2: Convert to fraction form
    392.04/587.86 = 172.58/x
  3. Step 3: Cross multiply
    392.04x = 587.86 × 172.58
  4. Step 4: Simplify right side
    392.04x = 101,449.51
  5. Step 5: Solve for x
    x = 101,449.51/392.04
  6. Step 6: Final answer
    x = 258.77

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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.