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Finding the Fourth Proportional to 5,308.78, 7,963.42 and 1,611.54

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Solution

The fourth proportional to 5,308.78, 7,963.42 and 1,611.54 is: 2,417.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,308.78 : 7,963.42 = 1,611.54 : x
  2. Step 2: Convert to fraction form
    5,308.78/7,963.42 = 1,611.54/x
  3. Step 3: Cross multiply
    5,308.78x = 7,963.42 × 1,611.54
  4. Step 4: Simplify right side
    5,308.78x = 12,833,369.87
  5. Step 5: Solve for x
    x = 12,833,369.87/5,308.78
  6. Step 6: Final answer
    x = 2,417.39

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1.5x scale

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.