Home / 2,785.78-4,178.70-1,325.08

Finding the Fourth Proportional to 2,785.78, 4,178.70 and 1,325.08

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Solution

The fourth proportional to 2,785.78, 4,178.70 and 1,325.08 is: 1,987.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.78 : 4,178.70 = 1,325.08 : x
  2. Step 2: Convert to fraction form
    2,785.78/4,178.70 = 1,325.08/x
  3. Step 3: Cross multiply
    2,785.78x = 4,178.70 × 1,325.08
  4. Step 4: Simplify right side
    2,785.78x = 5,537,111.80
  5. Step 5: Solve for x
    x = 5,537,111.80/2,785.78
  6. Step 6: Final answer
    x = 1,987.63

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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.