Home / 1,989.13-2,743.79-1,316.93

Finding the Fourth Proportional to 1,989.13, 2,743.79 and 1,316.93

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Solution

The fourth proportional to 1,989.13, 2,743.79 and 1,316.93 is: 1,816.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.13 : 2,743.79 = 1,316.93 : x
  2. Step 2: Convert to fraction form
    1,989.13/2,743.79 = 1,316.93/x
  3. Step 3: Cross multiply
    1,989.13x = 2,743.79 × 1,316.93
  4. Step 4: Simplify right side
    1,989.13x = 3,613,379.36
  5. Step 5: Solve for x
    x = 3,613,379.36/1,989.13
  6. Step 6: Final answer
    x = 1,816.56

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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.