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Finding the Fourth Proportional to 485.23, 727.67 and 156.15

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Solution

The fourth proportional to 485.23, 727.67 and 156.15 is: 234.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    485.23 : 727.67 = 156.15 : x
  2. Step 2: Convert to fraction form
    485.23/727.67 = 156.15/x
  3. Step 3: Cross multiply
    485.23x = 727.67 × 156.15
  4. Step 4: Simplify right side
    485.23x = 113,625.18
  5. Step 5: Solve for x
    x = 113,625.18/485.23
  6. Step 6: Final answer
    x = 234.17

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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.