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Finding the Fourth Proportional to 688.91, 1,033.16 and 201.89

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Solution

The fourth proportional to 688.91, 1,033.16 and 201.89 is: 302.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.91 : 1,033.16 = 201.89 : x
  2. Step 2: Convert to fraction form
    688.91/1,033.16 = 201.89/x
  3. Step 3: Cross multiply
    688.91x = 1,033.16 × 201.89
  4. Step 4: Simplify right side
    688.91x = 208,586.25
  5. Step 5: Solve for x
    x = 208,586.25/688.91
  6. Step 6: Final answer
    x = 302.78

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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.