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Finding the Fourth Proportional to 250.42, 345.54 and 139.89

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Solution

The fourth proportional to 250.42, 345.54 and 139.89 is: 193.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.42 : 345.54 = 139.89 : x
  2. Step 2: Convert to fraction form
    250.42/345.54 = 139.89/x
  3. Step 3: Cross multiply
    250.42x = 345.54 × 139.89
  4. Step 4: Simplify right side
    250.42x = 48,337.56
  5. Step 5: Solve for x
    x = 48,337.56/250.42
  6. Step 6: Final answer
    x = 193.03

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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.