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Finding the Fourth Proportional to 619.16, 854.43 and 339.40

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Solution

The fourth proportional to 619.16, 854.43 and 339.40 is: 468.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.16 : 854.43 = 339.40 : x
  2. Step 2: Convert to fraction form
    619.16/854.43 = 339.40/x
  3. Step 3: Cross multiply
    619.16x = 854.43 × 339.40
  4. Step 4: Simplify right side
    619.16x = 289,993.54
  5. Step 5: Solve for x
    x = 289,993.54/619.16
  6. Step 6: Final answer
    x = 468.37

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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.