Home / 2,400.70-3,311.63-1,405.78

Finding the Fourth Proportional to 2,400.70, 3,311.63 and 1,405.78

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Solution

The fourth proportional to 2,400.70, 3,311.63 and 1,405.78 is: 1,939.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,400.70 : 3,311.63 = 1,405.78 : x
  2. Step 2: Convert to fraction form
    2,400.70/3,311.63 = 1,405.78/x
  3. Step 3: Cross multiply
    2,400.70x = 3,311.63 × 1,405.78
  4. Step 4: Simplify right side
    2,400.70x = 4,655,425.60
  5. Step 5: Solve for x
    x = 4,655,425.60/2,400.70
  6. Step 6: Final answer
    x = 1,939.20

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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.