Home / 3,123.43-4,309.37-1,778.95

Finding the Fourth Proportional to 3,123.43, 4,309.37 and 1,778.95

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Solution

The fourth proportional to 3,123.43, 4,309.37 and 1,778.95 is: 2,454.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,123.43 : 4,309.37 = 1,778.95 : x
  2. Step 2: Convert to fraction form
    3,123.43/4,309.37 = 1,778.95/x
  3. Step 3: Cross multiply
    3,123.43x = 4,309.37 × 1,778.95
  4. Step 4: Simplify right side
    3,123.43x = 7,666,153.76
  5. Step 5: Solve for x
    x = 7,666,153.76/3,123.43
  6. Step 6: Final answer
    x = 2,454.40

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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.