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Finding the Fourth Proportional to 3,875.96, 5,806.64 and 1,929.53

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Solution

The fourth proportional to 3,875.96, 5,806.64 and 1,929.53 is: 2,890.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,875.96 : 5,806.64 = 1,929.53 : x
  2. Step 2: Convert to fraction form
    3,875.96/5,806.64 = 1,929.53/x
  3. Step 3: Cross multiply
    3,875.96x = 5,806.64 × 1,929.53
  4. Step 4: Simplify right side
    3,875.96x = 11,204,047.40
  5. Step 5: Solve for x
    x = 11,204,047.40/3,875.96
  6. Step 6: Final answer
    x = 2,890.65

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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.