Home / 2,102.31-2,901.29-1,218.60

Finding the Fourth Proportional to 2,102.31, 2,901.29 and 1,218.60

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Solution

The fourth proportional to 2,102.31, 2,901.29 and 1,218.60 is: 1,681.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.31 : 2,901.29 = 1,218.60 : x
  2. Step 2: Convert to fraction form
    2,102.31/2,901.29 = 1,218.60/x
  3. Step 3: Cross multiply
    2,102.31x = 2,901.29 × 1,218.60
  4. Step 4: Simplify right side
    2,102.31x = 3,535,505.90
  5. Step 5: Solve for x
    x = 3,535,505.90/2,102.31
  6. Step 6: Final answer
    x = 1,681.72

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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.