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Finding the Fourth Proportional to 5,281.93, 7,289.07 and 2,891.90

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Solution

The fourth proportional to 5,281.93, 7,289.07 and 2,891.90 is: 3,990.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.93 : 7,289.07 = 2,891.90 : x
  2. Step 2: Convert to fraction form
    5,281.93/7,289.07 = 2,891.90/x
  3. Step 3: Cross multiply
    5,281.93x = 7,289.07 × 2,891.90
  4. Step 4: Simplify right side
    5,281.93x = 21,079,261.53
  5. Step 5: Solve for x
    x = 21,079,261.53/5,281.93
  6. Step 6: Final answer
    x = 3,990.83

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1.5x scale

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.