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Finding the Fourth Proportional to 928.33, 1,392.55 and 303.63

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Solution

The fourth proportional to 928.33, 1,392.55 and 303.63 is: 455.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.33 : 1,392.55 = 303.63 : x
  2. Step 2: Convert to fraction form
    928.33/1,392.55 = 303.63/x
  3. Step 3: Cross multiply
    928.33x = 1,392.55 × 303.63
  4. Step 4: Simplify right side
    928.33x = 422,821.81
  5. Step 5: Solve for x
    x = 422,821.81/928.33
  6. Step 6: Final answer
    x = 455.46

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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.