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Finding the Fourth Proportional to 3,668.70, 5,145.90 and 3,668.70

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Solution

The fourth proportional to 3,668.70, 5,145.90 and 3,668.70 is: 5,145.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,668.70 : 5,145.90 = 3,668.70 : x
  2. Step 2: Convert to fraction form
    3,668.70/5,145.90 = 3,668.70/x
  3. Step 3: Cross multiply
    3,668.70x = 5,145.90 × 3,668.70
  4. Step 4: Simplify right side
    3,668.70x = 18,878,763.33
  5. Step 5: Solve for x
    x = 18,878,763.33/3,668.70
  6. Step 6: Final answer
    x = 5,145.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.