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Finding the Fourth Proportional to 3,992.55, 5,509.08 and 2,313.63

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Solution

The fourth proportional to 3,992.55, 5,509.08 and 2,313.63 is: 3,192.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.55 : 5,509.08 = 2,313.63 : x
  2. Step 2: Convert to fraction form
    3,992.55/5,509.08 = 2,313.63/x
  3. Step 3: Cross multiply
    3,992.55x = 5,509.08 × 2,313.63
  4. Step 4: Simplify right side
    3,992.55x = 12,745,972.76
  5. Step 5: Solve for x
    x = 12,745,972.76/3,992.55
  6. Step 6: Final answer
    x = 3,192.44

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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.