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Finding the Fourth Proportional to 1,269.87, 1,904.86 and 448.15

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Solution

The fourth proportional to 1,269.87, 1,904.86 and 448.15 is: 672.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,269.87 : 1,904.86 = 448.15 : x
  2. Step 2: Convert to fraction form
    1,269.87/1,904.86 = 448.15/x
  3. Step 3: Cross multiply
    1,269.87x = 1,904.86 × 448.15
  4. Step 4: Simplify right side
    1,269.87x = 853,651.24
  5. Step 5: Solve for x
    x = 853,651.24/1,269.87
  6. Step 6: Final answer
    x = 672.24

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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.