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Finding the Fourth Proportional to 2,801.42, 4,202.72 and 853.77

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Solution

The fourth proportional to 2,801.42, 4,202.72 and 853.77 is: 1,280.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,801.42 : 4,202.72 = 853.77 : x
  2. Step 2: Convert to fraction form
    2,801.42/4,202.72 = 853.77/x
  3. Step 3: Cross multiply
    2,801.42x = 4,202.72 × 853.77
  4. Step 4: Simplify right side
    2,801.42x = 3,588,170.95
  5. Step 5: Solve for x
    x = 3,588,170.95/2,801.42
  6. Step 6: Final answer
    x = 1,280.84

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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.