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Finding the Fourth Proportional to 2,005.81, 3,008.82 and 619.30

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Solution

The fourth proportional to 2,005.81, 3,008.82 and 619.30 is: 928.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,005.81 : 3,008.82 = 619.30 : x
  2. Step 2: Convert to fraction form
    2,005.81/3,008.82 = 619.30/x
  3. Step 3: Cross multiply
    2,005.81x = 3,008.82 × 619.30
  4. Step 4: Simplify right side
    2,005.81x = 1,863,349.64
  5. Step 5: Solve for x
    x = 1,863,349.64/2,005.81
  6. Step 6: Final answer
    x = 928.97

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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.