Home / 2,691.50-3,715.08-1,643.36

Finding the Fourth Proportional to 2,691.50, 3,715.08 and 1,643.36

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Solution

The fourth proportional to 2,691.50, 3,715.08 and 1,643.36 is: 2,268.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.50 : 3,715.08 = 1,643.36 : x
  2. Step 2: Convert to fraction form
    2,691.50/3,715.08 = 1,643.36/x
  3. Step 3: Cross multiply
    2,691.50x = 3,715.08 × 1,643.36
  4. Step 4: Simplify right side
    2,691.50x = 6,105,213.87
  5. Step 5: Solve for x
    x = 6,105,213.87/2,691.50
  6. Step 6: Final answer
    x = 2,268.33

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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.