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Finding the Fourth Proportional to 1,930.64, 2,893.56 and 889.16

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Solution

The fourth proportional to 1,930.64, 2,893.56 and 889.16 is: 1,332.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.64 : 2,893.56 = 889.16 : x
  2. Step 2: Convert to fraction form
    1,930.64/2,893.56 = 889.16/x
  3. Step 3: Cross multiply
    1,930.64x = 2,893.56 × 889.16
  4. Step 4: Simplify right side
    1,930.64x = 2,572,837.81
  5. Step 5: Solve for x
    x = 2,572,837.81/1,930.64
  6. Step 6: Final answer
    x = 1,332.63

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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.