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Finding the Fourth Proportional to 4,985.21, 7,480.29 and 3,665.72

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Solution

The fourth proportional to 4,985.21, 7,480.29 and 3,665.72 is: 5,500.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.21 : 7,480.29 = 3,665.72 : x
  2. Step 2: Convert to fraction form
    4,985.21/7,480.29 = 3,665.72/x
  3. Step 3: Cross multiply
    4,985.21x = 7,480.29 × 3,665.72
  4. Step 4: Simplify right side
    4,985.21x = 27,420,648.66
  5. Step 5: Solve for x
    x = 27,420,648.66/4,985.21
  6. Step 6: Final answer
    x = 5,500.40

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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.