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Finding the Fourth Proportional to 619.57, 855.04 and 357.60

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Solution

The fourth proportional to 619.57, 855.04 and 357.60 is: 493.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.57 : 855.04 = 357.60 : x
  2. Step 2: Convert to fraction form
    619.57/855.04 = 357.60/x
  3. Step 3: Cross multiply
    619.57x = 855.04 × 357.60
  4. Step 4: Simplify right side
    619.57x = 305,762.30
  5. Step 5: Solve for x
    x = 305,762.30/619.57
  6. Step 6: Final answer
    x = 493.51

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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.