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Finding the Fourth Proportional to 618.26, 853.14 and 352.70

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Solution

The fourth proportional to 618.26, 853.14 and 352.70 is: 486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.26 : 853.14 = 352.70 : x
  2. Step 2: Convert to fraction form
    618.26/853.14 = 352.70/x
  3. Step 3: Cross multiply
    618.26x = 853.14 × 352.70
  4. Step 4: Simplify right side
    618.26x = 300,904.61
  5. Step 5: Solve for x
    x = 300,904.61/618.26
  6. Step 6: Final answer
    x = 486.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.