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Finding the Fourth Proportional to 1,299.71, 1,948.86 and 889.31

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Solution

The fourth proportional to 1,299.71, 1,948.86 and 889.31 is: 1,333.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.71 : 1,948.86 = 889.31 : x
  2. Step 2: Convert to fraction form
    1,299.71/1,948.86 = 889.31/x
  3. Step 3: Cross multiply
    1,299.71x = 1,948.86 × 889.31
  4. Step 4: Simplify right side
    1,299.71x = 1,733,145.56
  5. Step 5: Solve for x
    x = 1,733,145.56/1,299.71
  6. Step 6: Final answer
    x = 1,333.48

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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.