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Finding the Fourth Proportional to 4,744.16, 7,111.08 and 1,821.20

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Solution

The fourth proportional to 4,744.16, 7,111.08 and 1,821.20 is: 2,729.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,744.16 : 7,111.08 = 1,821.20 : x
  2. Step 2: Convert to fraction form
    4,744.16/7,111.08 = 1,821.20/x
  3. Step 3: Cross multiply
    4,744.16x = 7,111.08 × 1,821.20
  4. Step 4: Simplify right side
    4,744.16x = 12,950,698.90
  5. Step 5: Solve for x
    x = 12,950,698.90/4,744.16
  6. Step 6: Final answer
    x = 2,729.82

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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.