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Finding the Fourth Proportional to 1,688.46, 2,532.70 and 866.28

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Solution

The fourth proportional to 1,688.46, 2,532.70 and 866.28 is: 1,299.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.46 : 2,532.70 = 866.28 : x
  2. Step 2: Convert to fraction form
    1,688.46/2,532.70 = 866.28/x
  3. Step 3: Cross multiply
    1,688.46x = 2,532.70 × 866.28
  4. Step 4: Simplify right side
    1,688.46x = 2,194,027.36
  5. Step 5: Solve for x
    x = 2,194,027.36/1,688.46
  6. Step 6: Final answer
    x = 1,299.43

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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.