Home / 2,117.63-2,921.64-1,278.60

Finding the Fourth Proportional to 2,117.63, 2,921.64 and 1,278.60

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Solution

The fourth proportional to 2,117.63, 2,921.64 and 1,278.60 is: 1,764.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.63 : 2,921.64 = 1,278.60 : x
  2. Step 2: Convert to fraction form
    2,117.63/2,921.64 = 1,278.60/x
  3. Step 3: Cross multiply
    2,117.63x = 2,921.64 × 1,278.60
  4. Step 4: Simplify right side
    2,117.63x = 3,735,608.90
  5. Step 5: Solve for x
    x = 3,735,608.90/2,117.63
  6. Step 6: Final answer
    x = 1,764.06

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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.