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Finding the Fourth Proportional to 4,868.80, 6,718.72 and 2,772.80

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Solution

The fourth proportional to 4,868.80, 6,718.72 and 2,772.80 is: 3,826.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,868.80 : 6,718.72 = 2,772.80 : x
  2. Step 2: Convert to fraction form
    4,868.80/6,718.72 = 2,772.80/x
  3. Step 3: Cross multiply
    4,868.80x = 6,718.72 × 2,772.80
  4. Step 4: Simplify right side
    4,868.80x = 18,629,666.82
  5. Step 5: Solve for x
    x = 18,629,666.82/4,868.80
  6. Step 6: Final answer
    x = 3,826.34

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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.