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Finding the Fourth Proportional to 4,807.89, 6,629.43 and 3,920.94

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Solution

The fourth proportional to 4,807.89, 6,629.43 and 3,920.94 is: 5,406.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,807.89 : 6,629.43 = 3,920.94 : x
  2. Step 2: Convert to fraction form
    4,807.89/6,629.43 = 3,920.94/x
  3. Step 3: Cross multiply
    4,807.89x = 6,629.43 × 3,920.94
  4. Step 4: Simplify right side
    4,807.89x = 25,993,597.26
  5. Step 5: Solve for x
    x = 25,993,597.26/4,807.89
  6. Step 6: Final answer
    x = 5,406.45

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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.