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Finding the Fourth Proportional to 259.29, 388.83 and 114.91

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Solution

The fourth proportional to 259.29, 388.83 and 114.91 is: 172.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.29 : 388.83 = 114.91 : x
  2. Step 2: Convert to fraction form
    259.29/388.83 = 114.91/x
  3. Step 3: Cross multiply
    259.29x = 388.83 × 114.91
  4. Step 4: Simplify right side
    259.29x = 44,680.46
  5. Step 5: Solve for x
    x = 44,680.46/259.29
  6. Step 6: Final answer
    x = 172.32

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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.