Home / 2,867.31-3,957.03-1,688.40

Finding the Fourth Proportional to 2,867.31, 3,957.03 and 1,688.40

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Solution

The fourth proportional to 2,867.31, 3,957.03 and 1,688.40 is: 2,330.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,867.31 : 3,957.03 = 1,688.40 : x
  2. Step 2: Convert to fraction form
    2,867.31/3,957.03 = 1,688.40/x
  3. Step 3: Cross multiply
    2,867.31x = 3,957.03 × 1,688.40
  4. Step 4: Simplify right side
    2,867.31x = 6,681,049.45
  5. Step 5: Solve for x
    x = 6,681,049.45/2,867.31
  6. Step 6: Final answer
    x = 2,330.08

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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.