Home / 2,400.72-3,312.26-1,405.90

Finding the Fourth Proportional to 2,400.72, 3,312.26 and 1,405.90

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Solution

The fourth proportional to 2,400.72, 3,312.26 and 1,405.90 is: 1,939.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,400.72 : 3,312.26 = 1,405.90 : x
  2. Step 2: Convert to fraction form
    2,400.72/3,312.26 = 1,405.90/x
  3. Step 3: Cross multiply
    2,400.72x = 3,312.26 × 1,405.90
  4. Step 4: Simplify right side
    2,400.72x = 4,656,706.33
  5. Step 5: Solve for x
    x = 4,656,706.33/2,400.72
  6. Step 6: Final answer
    x = 1,939.71

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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.