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Finding the Fourth Proportional to 3,486, 4,806.36 and 2,855.76

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Solution

The fourth proportional to 3,486, 4,806.36 and 2,855.76 is: 3,937.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486 : 4,806.36 = 2,855.76 : x
  2. Step 2: Convert to fraction form
    3,486/4,806.36 = 2,855.76/x
  3. Step 3: Cross multiply
    3,486x = 4,806.36 × 2,855.76
  4. Step 4: Simplify right side
    3,486x = 13,725,810.63
  5. Step 5: Solve for x
    x = 13,725,810.63/3,486
  6. Step 6: Final answer
    x = 3,937.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.