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Finding the Fourth Proportional to 4,280.88, 6,421 and 2,548

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Solution

The fourth proportional to 4,280.88, 6,421 and 2,548 is: 3,821.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,280.88 : 6,421 = 2,548 : x
  2. Step 2: Convert to fraction form
    4,280.88/6,421 = 2,548/x
  3. Step 3: Cross multiply
    4,280.88x = 6,421 × 2,548
  4. Step 4: Simplify right side
    4,280.88x = 16,360,708
  5. Step 5: Solve for x
    x = 16,360,708/4,280.88
  6. Step 6: Final answer
    x = 3,821.81

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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.