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Finding the Fourth Proportional to 5,728.10, 7,900.90 and 3,370.23

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Solution

The fourth proportional to 5,728.10, 7,900.90 and 3,370.23 is: 4,648.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,728.10 : 7,900.90 = 3,370.23 : x
  2. Step 2: Convert to fraction form
    5,728.10/7,900.90 = 3,370.23/x
  3. Step 3: Cross multiply
    5,728.10x = 7,900.90 × 3,370.23
  4. Step 4: Simplify right side
    5,728.10x = 26,627,841.78
  5. Step 5: Solve for x
    x = 26,627,841.78/5,728.10
  6. Step 6: Final answer
    x = 4,648.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.