Home / 3,108.16-4,662.21-916.85

Finding the Fourth Proportional to 3,108.16, 4,662.21 and 916.85

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Solution

The fourth proportional to 3,108.16, 4,662.21 and 916.85 is: 1,375.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.16 : 4,662.21 = 916.85 : x
  2. Step 2: Convert to fraction form
    3,108.16/4,662.21 = 916.85/x
  3. Step 3: Cross multiply
    3,108.16x = 4,662.21 × 916.85
  4. Step 4: Simplify right side
    3,108.16x = 4,274,557.17
  5. Step 5: Solve for x
    x = 4,274,557.17/3,108.16
  6. Step 6: Final answer
    x = 1,375.27

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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.