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Finding the Fourth Proportional to 935.84, 1,404.41 and 388.04

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Solution

The fourth proportional to 935.84, 1,404.41 and 388.04 is: 582.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.84 : 1,404.41 = 388.04 : x
  2. Step 2: Convert to fraction form
    935.84/1,404.41 = 388.04/x
  3. Step 3: Cross multiply
    935.84x = 1,404.41 × 388.04
  4. Step 4: Simplify right side
    935.84x = 544,958.29
  5. Step 5: Solve for x
    x = 544,958.29/935.84
  6. Step 6: Final answer
    x = 582.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.