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Finding the Fourth Proportional to 5,239.60, 7,230.80 and 2,881.89

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Solution

The fourth proportional to 5,239.60, 7,230.80 and 2,881.89 is: 3,977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,239.60 : 7,230.80 = 2,881.89 : x
  2. Step 2: Convert to fraction form
    5,239.60/7,230.80 = 2,881.89/x
  3. Step 3: Cross multiply
    5,239.60x = 7,230.80 × 2,881.89
  4. Step 4: Simplify right side
    5,239.60x = 20,838,355.80
  5. Step 5: Solve for x
    x = 20,838,355.80/5,239.60
  6. Step 6: Final answer
    x = 3,977.09

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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.