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Finding the Fourth Proportional to 3,318.44, 4,977.50 and 853.32

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Solution

The fourth proportional to 3,318.44, 4,977.50 and 853.32 is: 1,279.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.44 : 4,977.50 = 853.32 : x
  2. Step 2: Convert to fraction form
    3,318.44/4,977.50 = 853.32/x
  3. Step 3: Cross multiply
    3,318.44x = 4,977.50 × 853.32
  4. Step 4: Simplify right side
    3,318.44x = 4,247,400.30
  5. Step 5: Solve for x
    x = 4,247,400.30/3,318.44
  6. Step 6: Final answer
    x = 1,279.94

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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.