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Finding the Fourth Proportional to 2,746.77, 4,119.12 and 991.29

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Solution

The fourth proportional to 2,746.77, 4,119.12 and 991.29 is: 1,486.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,746.77 : 4,119.12 = 991.29 : x
  2. Step 2: Convert to fraction form
    2,746.77/4,119.12 = 991.29/x
  3. Step 3: Cross multiply
    2,746.77x = 4,119.12 × 991.29
  4. Step 4: Simplify right side
    2,746.77x = 4,083,242.46
  5. Step 5: Solve for x
    x = 4,083,242.46/2,746.77
  6. Step 6: Final answer
    x = 1,486.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.