Home / 2,469.15-3,406.45-1,420.65

Finding the Fourth Proportional to 2,469.15, 3,406.45 and 1,420.65

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Solution

The fourth proportional to 2,469.15, 3,406.45 and 1,420.65 is: 1,959.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,469.15 : 3,406.45 = 1,420.65 : x
  2. Step 2: Convert to fraction form
    2,469.15/3,406.45 = 1,420.65/x
  3. Step 3: Cross multiply
    2,469.15x = 3,406.45 × 1,420.65
  4. Step 4: Simplify right side
    2,469.15x = 4,839,373.19
  5. Step 5: Solve for x
    x = 4,839,373.19/2,469.15
  6. Step 6: Final answer
    x = 1,959.93

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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.