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Finding the Fourth Proportional to 418.93, 623.62 and 399.03

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Solution

The fourth proportional to 418.93, 623.62 and 399.03 is: 594.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.93 : 623.62 = 399.03 : x
  2. Step 2: Convert to fraction form
    418.93/623.62 = 399.03/x
  3. Step 3: Cross multiply
    418.93x = 623.62 × 399.03
  4. Step 4: Simplify right side
    418.93x = 248,843.09
  5. Step 5: Solve for x
    x = 248,843.09/418.93
  6. Step 6: Final answer
    x = 594.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.