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Finding the Fourth Proportional to 4,985.39, 7,471.03 and 2,765.20

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Solution

The fourth proportional to 4,985.39, 7,471.03 and 2,765.20 is: 4,143.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.39 : 7,471.03 = 2,765.20 : x
  2. Step 2: Convert to fraction form
    4,985.39/7,471.03 = 2,765.20/x
  3. Step 3: Cross multiply
    4,985.39x = 7,471.03 × 2,765.20
  4. Step 4: Simplify right side
    4,985.39x = 20,658,892.16
  5. Step 5: Solve for x
    x = 20,658,892.16/4,985.39
  6. Step 6: Final answer
    x = 4,143.89

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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.