Home / 3,177.72-4,386.42-2,390.40

Finding the Fourth Proportional to 3,177.72, 4,386.42 and 2,390.40

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Solution

The fourth proportional to 3,177.72, 4,386.42 and 2,390.40 is: 3,299.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,177.72 : 4,386.42 = 2,390.40 : x
  2. Step 2: Convert to fraction form
    3,177.72/4,386.42 = 2,390.40/x
  3. Step 3: Cross multiply
    3,177.72x = 4,386.42 × 2,390.40
  4. Step 4: Simplify right side
    3,177.72x = 10,485,298.37
  5. Step 5: Solve for x
    x = 10,485,298.37/3,177.72
  6. Step 6: Final answer
    x = 3,299.63

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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.