Home / 3,123.08-4,309.45-1,778.86

Finding the Fourth Proportional to 3,123.08, 4,309.45 and 1,778.86

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Solution

The fourth proportional to 3,123.08, 4,309.45 and 1,778.86 is: 2,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.08 : 4,309.45 = 1,778.86 : x
  2. Step 2: Convert to fraction form
    3,123.08/4,309.45 = 1,778.86/x
  3. Step 3: Cross multiply
    3,123.08x = 4,309.45 × 1,778.86
  4. Step 4: Simplify right side
    3,123.08x = 7,665,908.23
  5. Step 5: Solve for x
    x = 7,665,908.23/3,123.08
  6. Step 6: Final answer
    x = 2,454.60

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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.