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Finding the Fourth Proportional to 4,806.78, 7,213.37 and 1,686.78

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Solution

The fourth proportional to 4,806.78, 7,213.37 and 1,686.78 is: 2,531.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,806.78 : 7,213.37 = 1,686.78 : x
  2. Step 2: Convert to fraction form
    4,806.78/7,213.37 = 1,686.78/x
  3. Step 3: Cross multiply
    4,806.78x = 7,213.37 × 1,686.78
  4. Step 4: Simplify right side
    4,806.78x = 12,167,359.81
  5. Step 5: Solve for x
    x = 12,167,359.81/4,806.78
  6. Step 6: Final answer
    x = 2,531.29

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1.5x scale

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.