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Finding the Fourth Proportional to 3,124.78, 4,684.23 and 1,643.68

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Solution

The fourth proportional to 3,124.78, 4,684.23 and 1,643.68 is: 2,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.78 : 4,684.23 = 1,643.68 : x
  2. Step 2: Convert to fraction form
    3,124.78/4,684.23 = 1,643.68/x
  3. Step 3: Cross multiply
    3,124.78x = 4,684.23 × 1,643.68
  4. Step 4: Simplify right side
    3,124.78x = 7,699,375.17
  5. Step 5: Solve for x
    x = 7,699,375.17/3,124.78
  6. Step 6: Final answer
    x = 2,463.97

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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.