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Finding the Fourth Proportional to 612.62, 919.00 and 201.80

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Solution

The fourth proportional to 612.62, 919.00 and 201.80 is: 302.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612.62 : 919.00 = 201.80 : x
  2. Step 2: Convert to fraction form
    612.62/919.00 = 201.80/x
  3. Step 3: Cross multiply
    612.62x = 919.00 × 201.80
  4. Step 4: Simplify right side
    612.62x = 185,449.10
  5. Step 5: Solve for x
    x = 185,449.10/612.62
  6. Step 6: Final answer
    x = 302.72

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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.