Home / 2,785.24-3,848.70-1,855

Finding the Fourth Proportional to 2,785.24, 3,848.70 and 1,855

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Solution

The fourth proportional to 2,785.24, 3,848.70 and 1,855 is: 2,563.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.24 : 3,848.70 = 1,855 : x
  2. Step 2: Convert to fraction form
    2,785.24/3,848.70 = 1,855/x
  3. Step 3: Cross multiply
    2,785.24x = 3,848.70 × 1,855
  4. Step 4: Simplify right side
    2,785.24x = 7,139,338.50
  5. Step 5: Solve for x
    x = 7,139,338.50/2,785.24
  6. Step 6: Final answer
    x = 2,563.28

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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.