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Finding the Fourth Proportional to 250.47, 345.63 and 157.21

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Solution

The fourth proportional to 250.47, 345.63 and 157.21 is: 216.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.47 : 345.63 = 157.21 : x
  2. Step 2: Convert to fraction form
    250.47/345.63 = 157.21/x
  3. Step 3: Cross multiply
    250.47x = 345.63 × 157.21
  4. Step 4: Simplify right side
    250.47x = 54,336.49
  5. Step 5: Solve for x
    x = 54,336.49/250.47
  6. Step 6: Final answer
    x = 216.94

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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.