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Finding the Fourth Proportional to 1,688.73, 2,329.13 and 1,099.46

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Solution

The fourth proportional to 1,688.73, 2,329.13 and 1,099.46 is: 1,516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.73 : 2,329.13 = 1,099.46 : x
  2. Step 2: Convert to fraction form
    1,688.73/2,329.13 = 1,099.46/x
  3. Step 3: Cross multiply
    1,688.73x = 2,329.13 × 1,099.46
  4. Step 4: Simplify right side
    1,688.73x = 2,560,785.27
  5. Step 5: Solve for x
    x = 2,560,785.27/1,688.73
  6. Step 6: Final answer
    x = 1,516.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.