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Finding the Fourth Proportional to 619.56, 854.58 and 423.34

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Solution

The fourth proportional to 619.56, 854.58 and 423.34 is: 583.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.56 : 854.58 = 423.34 : x
  2. Step 2: Convert to fraction form
    619.56/854.58 = 423.34/x
  3. Step 3: Cross multiply
    619.56x = 854.58 × 423.34
  4. Step 4: Simplify right side
    619.56x = 361,777.90
  5. Step 5: Solve for x
    x = 361,777.90/619.56
  6. Step 6: Final answer
    x = 583.93

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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.