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Finding the Fourth Proportional to 3,503.40, 5,250.30 and 2,855.40

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Solution

The fourth proportional to 3,503.40, 5,250.30 and 2,855.40 is: 4,279.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,503.40 : 5,250.30 = 2,855.40 : x
  2. Step 2: Convert to fraction form
    3,503.40/5,250.30 = 2,855.40/x
  3. Step 3: Cross multiply
    3,503.40x = 5,250.30 × 2,855.40
  4. Step 4: Simplify right side
    3,503.40x = 14,991,706.62
  5. Step 5: Solve for x
    x = 14,991,706.62/3,503.40
  6. Step 6: Final answer
    x = 4,279.19

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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.