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Finding the Fourth Proportional to 1,805.05, 2,490.66 and 1,019.08

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Solution

The fourth proportional to 1,805.05, 2,490.66 and 1,019.08 is: 1,406.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,805.05 : 2,490.66 = 1,019.08 : x
  2. Step 2: Convert to fraction form
    1,805.05/2,490.66 = 1,019.08/x
  3. Step 3: Cross multiply
    1,805.05x = 2,490.66 × 1,019.08
  4. Step 4: Simplify right side
    1,805.05x = 2,538,181.79
  5. Step 5: Solve for x
    x = 2,538,181.79/1,805.05
  6. Step 6: Final answer
    x = 1,406.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.