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Finding the Fourth Proportional to 3,640.55, 5,023.22 and 2,148.63

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Solution

The fourth proportional to 3,640.55, 5,023.22 and 2,148.63 is: 2,964.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640.55 : 5,023.22 = 2,148.63 : x
  2. Step 2: Convert to fraction form
    3,640.55/5,023.22 = 2,148.63/x
  3. Step 3: Cross multiply
    3,640.55x = 5,023.22 × 2,148.63
  4. Step 4: Simplify right side
    3,640.55x = 10,793,011.61
  5. Step 5: Solve for x
    x = 10,793,011.61/3,640.55
  6. Step 6: Final answer
    x = 2,964.67

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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.