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Finding the Fourth Proportional to 200.79, 276.35 and 157.05

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Solution

The fourth proportional to 200.79, 276.35 and 157.05 is: 216.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.79 : 276.35 = 157.05 : x
  2. Step 2: Convert to fraction form
    200.79/276.35 = 157.05/x
  3. Step 3: Cross multiply
    200.79x = 276.35 × 157.05
  4. Step 4: Simplify right side
    200.79x = 43,399.98
  5. Step 5: Solve for x
    x = 43,399.98/200.79
  6. Step 6: Final answer
    x = 216.15

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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.