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Finding the Fourth Proportional to 928.81, 1,391.68 and 466.12

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Solution

The fourth proportional to 928.81, 1,391.68 and 466.12 is: 698.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.81 : 1,391.68 = 466.12 : x
  2. Step 2: Convert to fraction form
    928.81/1,391.68 = 466.12/x
  3. Step 3: Cross multiply
    928.81x = 1,391.68 × 466.12
  4. Step 4: Simplify right side
    928.81x = 648,689.88
  5. Step 5: Solve for x
    x = 648,689.88/928.81
  6. Step 6: Final answer
    x = 698.41

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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.