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Finding the Fourth Proportional to 434.56, 598.36 and 399.73

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Solution

The fourth proportional to 434.56, 598.36 and 399.73 is: 550.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.56 : 598.36 = 399.73 : x
  2. Step 2: Convert to fraction form
    434.56/598.36 = 399.73/x
  3. Step 3: Cross multiply
    434.56x = 598.36 × 399.73
  4. Step 4: Simplify right side
    434.56x = 239,177.45
  5. Step 5: Solve for x
    x = 239,177.45/434.56
  6. Step 6: Final answer
    x = 550.40

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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.