Home / 2,784.07-4,172.96-1,139.72

Finding the Fourth Proportional to 2,784.07, 4,172.96 and 1,139.72

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Solution

The fourth proportional to 2,784.07, 4,172.96 and 1,139.72 is: 1,708.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,784.07 : 4,172.96 = 1,139.72 : x
  2. Step 2: Convert to fraction form
    2,784.07/4,172.96 = 1,139.72/x
  3. Step 3: Cross multiply
    2,784.07x = 4,172.96 × 1,139.72
  4. Step 4: Simplify right side
    2,784.07x = 4,755,979.41
  5. Step 5: Solve for x
    x = 4,755,979.41/2,784.07
  6. Step 6: Final answer
    x = 1,708.28

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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.