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Finding the Fourth Proportional to 619.47, 854.87 and 357.49

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Solution

The fourth proportional to 619.47, 854.87 and 357.49 is: 493.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.47 : 854.87 = 357.49 : x
  2. Step 2: Convert to fraction form
    619.47/854.87 = 357.49/x
  3. Step 3: Cross multiply
    619.47x = 854.87 × 357.49
  4. Step 4: Simplify right side
    619.47x = 305,601.41
  5. Step 5: Solve for x
    x = 305,601.41/619.47
  6. Step 6: Final answer
    x = 493.33

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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.