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Finding the Fourth Proportional to 200.87, 277.32 and 145.55

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Solution

The fourth proportional to 200.87, 277.32 and 145.55 is: 200.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.87 : 277.32 = 145.55 : x
  2. Step 2: Convert to fraction form
    200.87/277.32 = 145.55/x
  3. Step 3: Cross multiply
    200.87x = 277.32 × 145.55
  4. Step 4: Simplify right side
    200.87x = 40,363.93
  5. Step 5: Solve for x
    x = 40,363.93/200.87
  6. Step 6: Final answer
    x = 200.95

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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.