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Finding the Fourth Proportional to 2,771.55, 4,157.33 and 691.55

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Solution

The fourth proportional to 2,771.55, 4,157.33 and 691.55 is: 1,037.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.55 : 4,157.33 = 691.55 : x
  2. Step 2: Convert to fraction form
    2,771.55/4,157.33 = 691.55/x
  3. Step 3: Cross multiply
    2,771.55x = 4,157.33 × 691.55
  4. Step 4: Simplify right side
    2,771.55x = 2,875,013.68
  5. Step 5: Solve for x
    x = 2,875,013.68/2,771.55
  6. Step 6: Final answer
    x = 1,037.33

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1.5x scale

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.