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Finding the Fourth Proportional to 1,930.48, 2,894.81 and 890.18

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Solution

The fourth proportional to 1,930.48, 2,894.81 and 890.18 is: 1,334.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,930.48 : 2,894.81 = 890.18 : x
  2. Step 2: Convert to fraction form
    1,930.48/2,894.81 = 890.18/x
  3. Step 3: Cross multiply
    1,930.48x = 2,894.81 × 890.18
  4. Step 4: Simplify right side
    1,930.48x = 2,576,897.34
  5. Step 5: Solve for x
    x = 2,576,897.34/1,930.48
  6. Step 6: Final answer
    x = 1,334.85

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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.