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Finding the Fourth Proportional to 4,985.12, 7,472.66 and 3,137.56

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Solution

The fourth proportional to 4,985.12, 7,472.66 and 3,137.56 is: 4,703.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,985.12 : 7,472.66 = 3,137.56 : x
  2. Step 2: Convert to fraction form
    4,985.12/7,472.66 = 3,137.56/x
  3. Step 3: Cross multiply
    4,985.12x = 7,472.66 × 3,137.56
  4. Step 4: Simplify right side
    4,985.12x = 23,445,919.11
  5. Step 5: Solve for x
    x = 23,445,919.11/4,985.12
  6. Step 6: Final answer
    x = 4,703.18

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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.