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Finding the Fourth Proportional to 688.66, 1,033.16 and 201.71

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Solution

The fourth proportional to 688.66, 1,033.16 and 201.71 is: 302.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.66 : 1,033.16 = 201.71 : x
  2. Step 2: Convert to fraction form
    688.66/1,033.16 = 201.71/x
  3. Step 3: Cross multiply
    688.66x = 1,033.16 × 201.71
  4. Step 4: Simplify right side
    688.66x = 208,400.10
  5. Step 5: Solve for x
    x = 208,400.10/688.66
  6. Step 6: Final answer
    x = 302.62

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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.