Home / 2,102.81-2,901.98-1,218.44

Finding the Fourth Proportional to 2,102.81, 2,901.98 and 1,218.44

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Solution

The fourth proportional to 2,102.81, 2,901.98 and 1,218.44 is: 1,681.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.81 : 2,901.98 = 1,218.44 : x
  2. Step 2: Convert to fraction form
    2,102.81/2,901.98 = 1,218.44/x
  3. Step 3: Cross multiply
    2,102.81x = 2,901.98 × 1,218.44
  4. Step 4: Simplify right side
    2,102.81x = 3,535,891.96
  5. Step 5: Solve for x
    x = 3,535,891.96/2,102.81
  6. Step 6: Final answer
    x = 1,681.51

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1.5x scale

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.