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Finding the Fourth Proportional to 688.79, 1,033.05 and 201.85

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Solution

The fourth proportional to 688.79, 1,033.05 and 201.85 is: 302.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.79 : 1,033.05 = 201.85 : x
  2. Step 2: Convert to fraction form
    688.79/1,033.05 = 201.85/x
  3. Step 3: Cross multiply
    688.79x = 1,033.05 × 201.85
  4. Step 4: Simplify right side
    688.79x = 208,519.32
  5. Step 5: Solve for x
    x = 208,519.32/688.79
  6. Step 6: Final answer
    x = 302.73

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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.