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Finding the Fourth Proportional to 5,239.90, 7,230.90 and 2,881.81

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Solution

The fourth proportional to 5,239.90, 7,230.90 and 2,881.81 is: 3,976.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.90 : 7,230.90 = 2,881.81 : x
  2. Step 2: Convert to fraction form
    5,239.90/7,230.90 = 2,881.81/x
  3. Step 3: Cross multiply
    5,239.90x = 7,230.90 × 2,881.81
  4. Step 4: Simplify right side
    5,239.90x = 20,838,079.93
  5. Step 5: Solve for x
    x = 20,838,079.93/5,239.90
  6. Step 6: Final answer
    x = 3,976.81

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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.