Home / 2,867.40-3,957.12-1,688.64

Finding the Fourth Proportional to 2,867.40, 3,957.12 and 1,688.64

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Solution

The fourth proportional to 2,867.40, 3,957.12 and 1,688.64 is: 2,330.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.40 : 3,957.12 = 1,688.64 : x
  2. Step 2: Convert to fraction form
    2,867.40/3,957.12 = 1,688.64/x
  3. Step 3: Cross multiply
    2,867.40x = 3,957.12 × 1,688.64
  4. Step 4: Simplify right side
    2,867.40x = 6,682,151.12
  5. Step 5: Solve for x
    x = 6,682,151.12/2,867.40
  6. Step 6: Final answer
    x = 2,330.39

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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.