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Finding the Fourth Proportional to 200.48, 276.88 and 145.40

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Solution

The fourth proportional to 200.48, 276.88 and 145.40 is: 200.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.48 : 276.88 = 145.40 : x
  2. Step 2: Convert to fraction form
    200.48/276.88 = 145.40/x
  3. Step 3: Cross multiply
    200.48x = 276.88 × 145.40
  4. Step 4: Simplify right side
    200.48x = 40,258.35
  5. Step 5: Solve for x
    x = 40,258.35/200.48
  6. Step 6: Final answer
    x = 200.81

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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.