Home / 1,986.02-2,740.23-1,239.71

Finding the Fourth Proportional to 1,986.02, 2,740.23 and 1,239.71

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Solution

The fourth proportional to 1,986.02, 2,740.23 and 1,239.71 is: 1,710.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,986.02 : 2,740.23 = 1,239.71 : x
  2. Step 2: Convert to fraction form
    1,986.02/2,740.23 = 1,239.71/x
  3. Step 3: Cross multiply
    1,986.02x = 2,740.23 × 1,239.71
  4. Step 4: Simplify right side
    1,986.02x = 3,397,090.53
  5. Step 5: Solve for x
    x = 3,397,090.53/1,986.02
  6. Step 6: Final answer
    x = 1,710.50

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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.