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Finding the Fourth Proportional to 4,990.99, 7,489.40 and 1,873.18

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Solution

The fourth proportional to 4,990.99, 7,489.40 and 1,873.18 is: 2,810.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.99 : 7,489.40 = 1,873.18 : x
  2. Step 2: Convert to fraction form
    4,990.99/7,489.40 = 1,873.18/x
  3. Step 3: Cross multiply
    4,990.99x = 7,489.40 × 1,873.18
  4. Step 4: Simplify right side
    4,990.99x = 14,028,994.29
  5. Step 5: Solve for x
    x = 14,028,994.29/4,990.99
  6. Step 6: Final answer
    x = 2,810.86

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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.