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Finding the Fourth Proportional to 404.01, 605.55 and 399.45

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Solution

The fourth proportional to 404.01, 605.55 and 399.45 is: 598.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.01 : 605.55 = 399.45 : x
  2. Step 2: Convert to fraction form
    404.01/605.55 = 399.45/x
  3. Step 3: Cross multiply
    404.01x = 605.55 × 399.45
  4. Step 4: Simplify right side
    404.01x = 241,886.95
  5. Step 5: Solve for x
    x = 241,886.95/404.01
  6. Step 6: Final answer
    x = 598.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.