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Finding the Fourth Proportional to 2,867.79, 3,957.33 and 1,688.70

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Solution

The fourth proportional to 2,867.79, 3,957.33 and 1,688.70 is: 2,330.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.79 : 3,957.33 = 1,688.70 : x
  2. Step 2: Convert to fraction form
    2,867.79/3,957.33 = 1,688.70/x
  3. Step 3: Cross multiply
    2,867.79x = 3,957.33 × 1,688.70
  4. Step 4: Simplify right side
    2,867.79x = 6,682,743.17
  5. Step 5: Solve for x
    x = 6,682,743.17/2,867.79
  6. Step 6: Final answer
    x = 2,330.28

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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.