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Finding the Fourth Proportional to 2,070.96, 3,107.40 and 916.56

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Solution

The fourth proportional to 2,070.96, 3,107.40 and 916.56 is: 1,375.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,070.96 : 3,107.40 = 916.56 : x
  2. Step 2: Convert to fraction form
    2,070.96/3,107.40 = 916.56/x
  3. Step 3: Cross multiply
    2,070.96x = 3,107.40 × 916.56
  4. Step 4: Simplify right side
    2,070.96x = 2,848,118.54
  5. Step 5: Solve for x
    x = 2,848,118.54/2,070.96
  6. Step 6: Final answer
    x = 1,375.26

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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.