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Finding the Fourth Proportional to 3,891.15, 5,834.97 and 1,117.20

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Solution

The fourth proportional to 3,891.15, 5,834.97 and 1,117.20 is: 1,675.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.15 : 5,834.97 = 1,117.20 : x
  2. Step 2: Convert to fraction form
    3,891.15/5,834.97 = 1,117.20/x
  3. Step 3: Cross multiply
    3,891.15x = 5,834.97 × 1,117.20
  4. Step 4: Simplify right side
    3,891.15x = 6,518,828.48
  5. Step 5: Solve for x
    x = 6,518,828.48/3,891.15
  6. Step 6: Final answer
    x = 1,675.30

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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.