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Finding the Fourth Proportional to 250.17, 345.23 and 139.65

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Solution

The fourth proportional to 250.17, 345.23 and 139.65 is: 192.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.17 : 345.23 = 139.65 : x
  2. Step 2: Convert to fraction form
    250.17/345.23 = 139.65/x
  3. Step 3: Cross multiply
    250.17x = 345.23 × 139.65
  4. Step 4: Simplify right side
    250.17x = 48,210.67
  5. Step 5: Solve for x
    x = 48,210.67/250.17
  6. Step 6: Final answer
    x = 192.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.