Home / 1,985.05-2,739.87-1,395.79

Finding the Fourth Proportional to 1,985.05, 2,739.87 and 1,395.79

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Solution

The fourth proportional to 1,985.05, 2,739.87 and 1,395.79 is: 1,926.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.05 : 2,739.87 = 1,395.79 : x
  2. Step 2: Convert to fraction form
    1,985.05/2,739.87 = 1,395.79/x
  3. Step 3: Cross multiply
    1,985.05x = 2,739.87 × 1,395.79
  4. Step 4: Simplify right side
    1,985.05x = 3,824,283.15
  5. Step 5: Solve for x
    x = 3,824,283.15/1,985.05
  6. Step 6: Final answer
    x = 1,926.54

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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.