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Finding the Fourth Proportional to 3,487.37, 4,812.65 and 1,915.46

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Solution

The fourth proportional to 3,487.37, 4,812.65 and 1,915.46 is: 2,643.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.37 : 4,812.65 = 1,915.46 : x
  2. Step 2: Convert to fraction form
    3,487.37/4,812.65 = 1,915.46/x
  3. Step 3: Cross multiply
    3,487.37x = 4,812.65 × 1,915.46
  4. Step 4: Simplify right side
    3,487.37x = 9,218,455.39
  5. Step 5: Solve for x
    x = 9,218,455.39/3,487.37
  6. Step 6: Final answer
    x = 2,643.39

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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.