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Finding the Fourth Proportional to 250.47, 345.55 and 145.57

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Solution

The fourth proportional to 250.47, 345.55 and 145.57 is: 200.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    250.47 : 345.55 = 145.57 : x
  2. Step 2: Convert to fraction form
    250.47/345.55 = 145.57/x
  3. Step 3: Cross multiply
    250.47x = 345.55 × 145.57
  4. Step 4: Simplify right side
    250.47x = 50,301.71
  5. Step 5: Solve for x
    x = 50,301.71/250.47
  6. Step 6: Final answer
    x = 200.83

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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.