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Finding the Fourth Proportional to 2,992.68, 4,490 and 1,119.55

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Solution

The fourth proportional to 2,992.68, 4,490 and 1,119.55 is: 1,679.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,992.68 : 4,490 = 1,119.55 : x
  2. Step 2: Convert to fraction form
    2,992.68/4,490 = 1,119.55/x
  3. Step 3: Cross multiply
    2,992.68x = 4,490 × 1,119.55
  4. Step 4: Simplify right side
    2,992.68x = 5,026,779.50
  5. Step 5: Solve for x
    x = 5,026,779.50/2,992.68
  6. Step 6: Final answer
    x = 1,679.69

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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.