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Finding the Fourth Proportional to 453.03, 624.99 and 305.41

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Solution

The fourth proportional to 453.03, 624.99 and 305.41 is: 421.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.03 : 624.99 = 305.41 : x
  2. Step 2: Convert to fraction form
    453.03/624.99 = 305.41/x
  3. Step 3: Cross multiply
    453.03x = 624.99 × 305.41
  4. Step 4: Simplify right side
    453.03x = 190,878.56
  5. Step 5: Solve for x
    x = 190,878.56/453.03
  6. Step 6: Final answer
    x = 421.34

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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.