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Finding the Fourth Proportional to 404.63, 554.74 and 397.34

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Solution

The fourth proportional to 404.63, 554.74 and 397.34 is: 544.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.63 : 554.74 = 397.34 : x
  2. Step 2: Convert to fraction form
    404.63/554.74 = 397.34/x
  3. Step 3: Cross multiply
    404.63x = 554.74 × 397.34
  4. Step 4: Simplify right side
    404.63x = 220,420.39
  5. Step 5: Solve for x
    x = 220,420.39/404.63
  6. Step 6: Final answer
    x = 544.75

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.