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Finding the Fourth Proportional to 434.64, 599.97 and 287.22

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Solution

The fourth proportional to 434.64, 599.97 and 287.22 is: 396.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.64 : 599.97 = 287.22 : x
  2. Step 2: Convert to fraction form
    434.64/599.97 = 287.22/x
  3. Step 3: Cross multiply
    434.64x = 599.97 × 287.22
  4. Step 4: Simplify right side
    434.64x = 172,321.13
  5. Step 5: Solve for x
    x = 172,321.13/434.64
  6. Step 6: Final answer
    x = 396.47

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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.