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Finding the Fourth Proportional to 853.64, 1,279.14 and 506.28

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Solution

The fourth proportional to 853.64, 1,279.14 and 506.28 is: 758.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.64 : 1,279.14 = 506.28 : x
  2. Step 2: Convert to fraction form
    853.64/1,279.14 = 506.28/x
  3. Step 3: Cross multiply
    853.64x = 1,279.14 × 506.28
  4. Step 4: Simplify right side
    853.64x = 647,603.00
  5. Step 5: Solve for x
    x = 647,603.00/853.64
  6. Step 6: Final answer
    x = 758.64

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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.