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Finding the Fourth Proportional to 523.64, 721.90 and 383.58

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Solution

The fourth proportional to 523.64, 721.90 and 383.58 is: 528.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.64 : 721.90 = 383.58 : x
  2. Step 2: Convert to fraction form
    523.64/721.90 = 383.58/x
  3. Step 3: Cross multiply
    523.64x = 721.90 × 383.58
  4. Step 4: Simplify right side
    523.64x = 276,906.40
  5. Step 5: Solve for x
    x = 276,906.40/523.64
  6. Step 6: Final answer
    x = 528.81

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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.