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Finding the Fourth Proportional to 4,274.40, 6,407.46 and 1,639.89

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Solution

The fourth proportional to 4,274.40, 6,407.46 and 1,639.89 is: 2,458.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,274.40 : 6,407.46 = 1,639.89 : x
  2. Step 2: Convert to fraction form
    4,274.40/6,407.46 = 1,639.89/x
  3. Step 3: Cross multiply
    4,274.40x = 6,407.46 × 1,639.89
  4. Step 4: Simplify right side
    4,274.40x = 10,507,529.58
  5. Step 5: Solve for x
    x = 10,507,529.58/4,274.40
  6. Step 6: Final answer
    x = 2,458.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.