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Finding the Fourth Proportional to 5,271.57, 7,274.79 and 2,913.80

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Solution

The fourth proportional to 5,271.57, 7,274.79 and 2,913.80 is: 4,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,271.57 : 7,274.79 = 2,913.80 : x
  2. Step 2: Convert to fraction form
    5,271.57/7,274.79 = 2,913.80/x
  3. Step 3: Cross multiply
    5,271.57x = 7,274.79 × 2,913.80
  4. Step 4: Simplify right side
    5,271.57x = 21,197,246.73
  5. Step 5: Solve for x
    x = 21,197,246.73/5,271.57
  6. Step 6: Final answer
    x = 4,021.05

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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.