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Finding the Fourth Proportional to 612.77, 919.28 and 201.87

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Solution

The fourth proportional to 612.77, 919.28 and 201.87 is: 302.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.77 : 919.28 = 201.87 : x
  2. Step 2: Convert to fraction form
    612.77/919.28 = 201.87/x
  3. Step 3: Cross multiply
    612.77x = 919.28 × 201.87
  4. Step 4: Simplify right side
    612.77x = 185,575.56
  5. Step 5: Solve for x
    x = 185,575.56/612.77
  6. Step 6: Final answer
    x = 302.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.