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Finding the Fourth Proportional to 3,381.63, 5,071.62 and 916.29

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Solution

The fourth proportional to 3,381.63, 5,071.62 and 916.29 is: 1,374.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.63 : 5,071.62 = 916.29 : x
  2. Step 2: Convert to fraction form
    3,381.63/5,071.62 = 916.29/x
  3. Step 3: Cross multiply
    3,381.63x = 5,071.62 × 916.29
  4. Step 4: Simplify right side
    3,381.63x = 4,647,074.69
  5. Step 5: Solve for x
    x = 4,647,074.69/3,381.63
  6. Step 6: Final answer
    x = 1,374.21

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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.