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Finding the Fourth Proportional to 4,200.63, 6,300.63 and 1,278.75

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Solution

The fourth proportional to 4,200.63, 6,300.63 and 1,278.75 is: 1,918.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,200.63 : 6,300.63 = 1,278.75 : x
  2. Step 2: Convert to fraction form
    4,200.63/6,300.63 = 1,278.75/x
  3. Step 3: Cross multiply
    4,200.63x = 6,300.63 × 1,278.75
  4. Step 4: Simplify right side
    4,200.63x = 8,056,930.61
  5. Step 5: Solve for x
    x = 8,056,930.61/4,200.63
  6. Step 6: Final answer
    x = 1,918.03

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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.