Home / 1,643.80-2,462.70-1,299.40

Finding the Fourth Proportional to 1,643.80, 2,462.70 and 1,299.40

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Solution

The fourth proportional to 1,643.80, 2,462.70 and 1,299.40 is: 1,946.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,643.80 : 2,462.70 = 1,299.40 : x
  2. Step 2: Convert to fraction form
    1,643.80/2,462.70 = 1,299.40/x
  3. Step 3: Cross multiply
    1,643.80x = 2,462.70 × 1,299.40
  4. Step 4: Simplify right side
    1,643.80x = 3,200,032.38
  5. Step 5: Solve for x
    x = 3,200,032.38/1,643.80
  6. Step 6: Final answer
    x = 1,946.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.