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Finding the Fourth Proportional to 1,930.05, 2,894.67 and 890.08

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Solution

The fourth proportional to 1,930.05, 2,894.67 and 890.08 is: 1,334.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.05 : 2,894.67 = 890.08 : x
  2. Step 2: Convert to fraction form
    1,930.05/2,894.67 = 890.08/x
  3. Step 3: Cross multiply
    1,930.05x = 2,894.67 × 890.08
  4. Step 4: Simplify right side
    1,930.05x = 2,576,480.64
  5. Step 5: Solve for x
    x = 2,576,480.64/1,930.05
  6. Step 6: Final answer
    x = 1,334.93

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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.