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Finding the Fourth Proportional to 453, 623.79 and 397.44

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Solution

The fourth proportional to 453, 623.79 and 397.44 is: 547.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    453 : 623.79 = 397.44 : x
  2. Step 2: Convert to fraction form
    453/623.79 = 397.44/x
  3. Step 3: Cross multiply
    453x = 623.79 × 397.44
  4. Step 4: Simplify right side
    453x = 247,919.10
  5. Step 5: Solve for x
    x = 247,919.10/453
  6. Step 6: Final answer
    x = 547.28

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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.