Home / 2,102.76-2,901.80-1,218.56

Finding the Fourth Proportional to 2,102.76, 2,901.80 and 1,218.56

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Solution

The fourth proportional to 2,102.76, 2,901.80 and 1,218.56 is: 1,681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,102.76 : 2,901.80 = 1,218.56 : x
  2. Step 2: Convert to fraction form
    2,102.76/2,901.80 = 1,218.56/x
  3. Step 3: Cross multiply
    2,102.76x = 2,901.80 × 1,218.56
  4. Step 4: Simplify right side
    2,102.76x = 3,535,996.81
  5. Step 5: Solve for x
    x = 3,535,996.81/2,102.76
  6. Step 6: Final answer
    x = 1,681.60

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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.