Home / 1,681.64-2,321.38-1,129.96

Finding the Fourth Proportional to 1,681.64, 2,321.38 and 1,129.96

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Solution

The fourth proportional to 1,681.64, 2,321.38 and 1,129.96 is: 1,559.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.64 : 2,321.38 = 1,129.96 : x
  2. Step 2: Convert to fraction form
    1,681.64/2,321.38 = 1,129.96/x
  3. Step 3: Cross multiply
    1,681.64x = 2,321.38 × 1,129.96
  4. Step 4: Simplify right side
    1,681.64x = 2,623,066.54
  5. Step 5: Solve for x
    x = 2,623,066.54/1,681.64
  6. Step 6: Final answer
    x = 1,559.83

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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.