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Finding the Fourth Proportional to 3,121.26, 4,682.76 and 930.06

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Solution

The fourth proportional to 3,121.26, 4,682.76 and 930.06 is: 1,395.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.26 : 4,682.76 = 930.06 : x
  2. Step 2: Convert to fraction form
    3,121.26/4,682.76 = 930.06/x
  3. Step 3: Cross multiply
    3,121.26x = 4,682.76 × 930.06
  4. Step 4: Simplify right side
    3,121.26x = 4,355,247.77
  5. Step 5: Solve for x
    x = 4,355,247.77/3,121.26
  6. Step 6: Final answer
    x = 1,395.35

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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.