Home / 2,688.78-4,031.79-933.60

Finding the Fourth Proportional to 2,688.78, 4,031.79 and 933.60

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Solution

The fourth proportional to 2,688.78, 4,031.79 and 933.60 is: 1,399.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.78 : 4,031.79 = 933.60 : x
  2. Step 2: Convert to fraction form
    2,688.78/4,031.79 = 933.60/x
  3. Step 3: Cross multiply
    2,688.78x = 4,031.79 × 933.60
  4. Step 4: Simplify right side
    2,688.78x = 3,764,079.14
  5. Step 5: Solve for x
    x = 3,764,079.14/2,688.78
  6. Step 6: Final answer
    x = 1,399.92

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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.