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Finding the Fourth Proportional to 251.55, 347.19 and 145.23

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Solution

The fourth proportional to 251.55, 347.19 and 145.23 is: 200.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.55 : 347.19 = 145.23 : x
  2. Step 2: Convert to fraction form
    251.55/347.19 = 145.23/x
  3. Step 3: Cross multiply
    251.55x = 347.19 × 145.23
  4. Step 4: Simplify right side
    251.55x = 50,422.40
  5. Step 5: Solve for x
    x = 50,422.40/251.55
  6. Step 6: Final answer
    x = 200.45

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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.