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Finding the Fourth Proportional to 618.34, 853.35 and 352.86

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Solution

The fourth proportional to 618.34, 853.35 and 352.86 is: 486.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.34 : 853.35 = 352.86 : x
  2. Step 2: Convert to fraction form
    618.34/853.35 = 352.86/x
  3. Step 3: Cross multiply
    618.34x = 853.35 × 352.86
  4. Step 4: Simplify right side
    618.34x = 301,111.32
  5. Step 5: Solve for x
    x = 301,111.32/618.34
  6. Step 6: Final answer
    x = 486.97

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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.