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Finding the Fourth Proportional to 2,855.68, 4,262.75 and 2,790.88

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Solution

The fourth proportional to 2,855.68, 4,262.75 and 2,790.88 is: 4,166.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.68 : 4,262.75 = 2,790.88 : x
  2. Step 2: Convert to fraction form
    2,855.68/4,262.75 = 2,790.88/x
  3. Step 3: Cross multiply
    2,855.68x = 4,262.75 × 2,790.88
  4. Step 4: Simplify right side
    2,855.68x = 11,896,823.72
  5. Step 5: Solve for x
    x = 11,896,823.72/2,855.68
  6. Step 6: Final answer
    x = 4,166.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.