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Finding the Fourth Proportional to 3,405.75, 5,108.51 and 940.71

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Solution

The fourth proportional to 3,405.75, 5,108.51 and 940.71 is: 1,411.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,405.75 : 5,108.51 = 940.71 : x
  2. Step 2: Convert to fraction form
    3,405.75/5,108.51 = 940.71/x
  3. Step 3: Cross multiply
    3,405.75x = 5,108.51 × 940.71
  4. Step 4: Simplify right side
    3,405.75x = 4,805,621.74
  5. Step 5: Solve for x
    x = 4,805,621.74/3,405.75
  6. Step 6: Final answer
    x = 1,411.03

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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.