Home / 2,117.12-2,921.77-1,172.95

Finding the Fourth Proportional to 2,117.12, 2,921.77 and 1,172.95

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Solution

The fourth proportional to 2,117.12, 2,921.77 and 1,172.95 is: 1,618.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.12 : 2,921.77 = 1,172.95 : x
  2. Step 2: Convert to fraction form
    2,117.12/2,921.77 = 1,172.95/x
  3. Step 3: Cross multiply
    2,117.12x = 2,921.77 × 1,172.95
  4. Step 4: Simplify right side
    2,117.12x = 3,427,090.12
  5. Step 5: Solve for x
    x = 3,427,090.12/2,117.12
  6. Step 6: Final answer
    x = 1,618.75

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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.