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Finding the Fourth Proportional to 1,326.44, 1,989.74 and 448.87

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Solution

The fourth proportional to 1,326.44, 1,989.74 and 448.87 is: 673.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.44 : 1,989.74 = 448.87 : x
  2. Step 2: Convert to fraction form
    1,326.44/1,989.74 = 448.87/x
  3. Step 3: Cross multiply
    1,326.44x = 1,989.74 × 448.87
  4. Step 4: Simplify right side
    1,326.44x = 893,130.74
  5. Step 5: Solve for x
    x = 893,130.74/1,326.44
  6. Step 6: Final answer
    x = 673.33

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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.