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Finding the Fourth Proportional to 618.92, 853.39 and 575.18

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Solution

The fourth proportional to 618.92, 853.39 and 575.18 is: 793.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.92 : 853.39 = 575.18 : x
  2. Step 2: Convert to fraction form
    618.92/853.39 = 575.18/x
  3. Step 3: Cross multiply
    618.92x = 853.39 × 575.18
  4. Step 4: Simplify right side
    618.92x = 490,852.86
  5. Step 5: Solve for x
    x = 490,852.86/618.92
  6. Step 6: Final answer
    x = 793.08

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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.