Home / 2,018.79-2,784.64-1,272.11

Finding the Fourth Proportional to 2,018.79, 2,784.64 and 1,272.11

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Solution

The fourth proportional to 2,018.79, 2,784.64 and 1,272.11 is: 1,754.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,018.79 : 2,784.64 = 1,272.11 : x
  2. Step 2: Convert to fraction form
    2,018.79/2,784.64 = 1,272.11/x
  3. Step 3: Cross multiply
    2,018.79x = 2,784.64 × 1,272.11
  4. Step 4: Simplify right side
    2,018.79x = 3,542,368.39
  5. Step 5: Solve for x
    x = 3,542,368.39/2,018.79
  6. Step 6: Final answer
    x = 1,754.70

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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.