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Finding the Fourth Proportional to 619.83, 855.36 and 357.84

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Solution

The fourth proportional to 619.83, 855.36 and 357.84 is: 493.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.83 : 855.36 = 357.84 : x
  2. Step 2: Convert to fraction form
    619.83/855.36 = 357.84/x
  3. Step 3: Cross multiply
    619.83x = 855.36 × 357.84
  4. Step 4: Simplify right side
    619.83x = 306,082.02
  5. Step 5: Solve for x
    x = 306,082.02/619.83
  6. Step 6: Final answer
    x = 493.82

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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.