Home / 1,447.61-1,998.45-1,115.30

Finding the Fourth Proportional to 1,447.61, 1,998.45 and 1,115.30

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Solution

The fourth proportional to 1,447.61, 1,998.45 and 1,115.30 is: 1,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.61 : 1,998.45 = 1,115.30 : x
  2. Step 2: Convert to fraction form
    1,447.61/1,998.45 = 1,115.30/x
  3. Step 3: Cross multiply
    1,447.61x = 1,998.45 × 1,115.30
  4. Step 4: Simplify right side
    1,447.61x = 2,228,861.29
  5. Step 5: Solve for x
    x = 2,228,861.29/1,447.61
  6. Step 6: Final answer
    x = 1,539.69

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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.