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Finding the Fourth Proportional to 4,629, 6,388.32 and 2,639.64

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Solution

The fourth proportional to 4,629, 6,388.32 and 2,639.64 is: 3,642.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,629 : 6,388.32 = 2,639.64 : x
  2. Step 2: Convert to fraction form
    4,629/6,388.32 = 2,639.64/x
  3. Step 3: Cross multiply
    4,629x = 6,388.32 × 2,639.64
  4. Step 4: Simplify right side
    4,629x = 16,862,865.00
  5. Step 5: Solve for x
    x = 16,862,865.00/4,629
  6. Step 6: Final answer
    x = 3,642.87

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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.