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Finding the Fourth Proportional to 3,486.89, 4,812.02 and 1,915.02

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Solution

The fourth proportional to 3,486.89, 4,812.02 and 1,915.02 is: 2,642.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.89 : 4,812.02 = 1,915.02 : x
  2. Step 2: Convert to fraction form
    3,486.89/4,812.02 = 1,915.02/x
  3. Step 3: Cross multiply
    3,486.89x = 4,812.02 × 1,915.02
  4. Step 4: Simplify right side
    3,486.89x = 9,215,114.54
  5. Step 5: Solve for x
    x = 9,215,114.54/3,486.89
  6. Step 6: Final answer
    x = 2,642.79

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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.