Home / 3,178.40-4,389.72-2,395.76

Finding the Fourth Proportional to 3,178.40, 4,389.72 and 2,395.76

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Solution

The fourth proportional to 3,178.40, 4,389.72 and 2,395.76 is: 3,308.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.40 : 4,389.72 = 2,395.76 : x
  2. Step 2: Convert to fraction form
    3,178.40/4,389.72 = 2,395.76/x
  3. Step 3: Cross multiply
    3,178.40x = 4,389.72 × 2,395.76
  4. Step 4: Simplify right side
    3,178.40x = 10,516,715.59
  5. Step 5: Solve for x
    x = 10,516,715.59/3,178.40
  6. Step 6: Final answer
    x = 3,308.81

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1.5x scale

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.