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Finding the Fourth Proportional to 453, 624.96 and 287.22

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Solution

The fourth proportional to 453, 624.96 and 287.22 is: 396.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    453 : 624.96 = 287.22 : x
  2. Step 2: Convert to fraction form
    453/624.96 = 287.22/x
  3. Step 3: Cross multiply
    453x = 624.96 × 287.22
  4. Step 4: Simplify right side
    453x = 179,501.01
  5. Step 5: Solve for x
    x = 179,501.01/453
  6. Step 6: Final answer
    x = 396.25

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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.