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Finding the Fourth Proportional to 2,707.56, 4,060.53 and 858.60

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Solution

The fourth proportional to 2,707.56, 4,060.53 and 858.60 is: 1,287.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,707.56 : 4,060.53 = 858.60 : x
  2. Step 2: Convert to fraction form
    2,707.56/4,060.53 = 858.60/x
  3. Step 3: Cross multiply
    2,707.56x = 4,060.53 × 858.60
  4. Step 4: Simplify right side
    2,707.56x = 3,486,371.06
  5. Step 5: Solve for x
    x = 3,486,371.06/2,707.56
  6. Step 6: Final answer
    x = 1,287.64

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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.