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Finding the Fourth Proportional to 200.19, 276.40 and 147.79

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Solution

The fourth proportional to 200.19, 276.40 and 147.79 is: 204.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.19 : 276.40 = 147.79 : x
  2. Step 2: Convert to fraction form
    200.19/276.40 = 147.79/x
  3. Step 3: Cross multiply
    200.19x = 276.40 × 147.79
  4. Step 4: Simplify right side
    200.19x = 40,849.16
  5. Step 5: Solve for x
    x = 40,849.16/200.19
  6. Step 6: Final answer
    x = 204.05

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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.