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Finding the Fourth Proportional to 200.77, 277.41 and 145.69

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Solution

The fourth proportional to 200.77, 277.41 and 145.69 is: 201.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.77 : 277.41 = 145.69 : x
  2. Step 2: Convert to fraction form
    200.77/277.41 = 145.69/x
  3. Step 3: Cross multiply
    200.77x = 277.41 × 145.69
  4. Step 4: Simplify right side
    200.77x = 40,415.86
  5. Step 5: Solve for x
    x = 40,415.86/200.77
  6. Step 6: Final answer
    x = 201.30

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Find fourth proportional to 100.39, 138.71 and 72.85
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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.