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Finding the Fourth Proportional to 435.30, 599.79 and 399.93

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Solution

The fourth proportional to 435.30, 599.79 and 399.93 is: 551.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.30 : 599.79 = 399.93 : x
  2. Step 2: Convert to fraction form
    435.30/599.79 = 399.93/x
  3. Step 3: Cross multiply
    435.30x = 599.79 × 399.93
  4. Step 4: Simplify right side
    435.30x = 239,874.01
  5. Step 5: Solve for x
    x = 239,874.01/435.30
  6. Step 6: Final answer
    x = 551.05

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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.