Home / 4,172.78-5,758.56-2,309.78

Finding the Fourth Proportional to 4,172.78, 5,758.56 and 2,309.78

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Solution

The fourth proportional to 4,172.78, 5,758.56 and 2,309.78 is: 3,187.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,172.78 : 5,758.56 = 2,309.78 : x
  2. Step 2: Convert to fraction form
    4,172.78/5,758.56 = 2,309.78/x
  3. Step 3: Cross multiply
    4,172.78x = 5,758.56 × 2,309.78
  4. Step 4: Simplify right side
    4,172.78x = 13,301,006.72
  5. Step 5: Solve for x
    x = 13,301,006.72/4,172.78
  6. Step 6: Final answer
    x = 3,187.56

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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.