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Finding the Fourth Proportional to 619.28, 854.54 and 343.28

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Solution

The fourth proportional to 619.28, 854.54 and 343.28 is: 473.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.28 : 854.54 = 343.28 : x
  2. Step 2: Convert to fraction form
    619.28/854.54 = 343.28/x
  3. Step 3: Cross multiply
    619.28x = 854.54 × 343.28
  4. Step 4: Simplify right side
    619.28x = 293,346.49
  5. Step 5: Solve for x
    x = 293,346.49/619.28
  6. Step 6: Final answer
    x = 473.69

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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.