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Finding the Fourth Proportional to 3,891.40, 5,837.13 and 969.59

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Solution

The fourth proportional to 3,891.40, 5,837.13 and 969.59 is: 1,454.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.40 : 5,837.13 = 969.59 : x
  2. Step 2: Convert to fraction form
    3,891.40/5,837.13 = 969.59/x
  3. Step 3: Cross multiply
    3,891.40x = 5,837.13 × 969.59
  4. Step 4: Simplify right side
    3,891.40x = 5,659,637.47
  5. Step 5: Solve for x
    x = 5,659,637.47/3,891.40
  6. Step 6: Final answer
    x = 1,454.40

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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.