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Finding the Fourth Proportional to 2,686.50, 4,029.75 and 955.13

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Solution

The fourth proportional to 2,686.50, 4,029.75 and 955.13 is: 1,432.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.50 : 4,029.75 = 955.13 : x
  2. Step 2: Convert to fraction form
    2,686.50/4,029.75 = 955.13/x
  3. Step 3: Cross multiply
    2,686.50x = 4,029.75 × 955.13
  4. Step 4: Simplify right side
    2,686.50x = 3,848,914.97
  5. Step 5: Solve for x
    x = 3,848,914.97/2,686.50
  6. Step 6: Final answer
    x = 1,432.69

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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.