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Finding the Fourth Proportional to 619.47, 854.91 and 353.97

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Solution

The fourth proportional to 619.47, 854.91 and 353.97 is: 488.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.47 : 854.91 = 353.97 : x
  2. Step 2: Convert to fraction form
    619.47/854.91 = 353.97/x
  3. Step 3: Cross multiply
    619.47x = 854.91 × 353.97
  4. Step 4: Simplify right side
    619.47x = 302,612.49
  5. Step 5: Solve for x
    x = 302,612.49/619.47
  6. Step 6: Final answer
    x = 488.50

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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.