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Finding the Fourth Proportional to 853.00, 1,279.61 and 305.05

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Solution

The fourth proportional to 853.00, 1,279.61 and 305.05 is: 457.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.00 : 1,279.61 = 305.05 : x
  2. Step 2: Convert to fraction form
    853.00/1,279.61 = 305.05/x
  3. Step 3: Cross multiply
    853.00x = 1,279.61 × 305.05
  4. Step 4: Simplify right side
    853.00x = 390,337.11
  5. Step 5: Solve for x
    x = 390,337.11/853.00
  6. Step 6: Final answer
    x = 457.61

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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.