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Finding the Fourth Proportional to 928.21, 1,392.45 and 466.02

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Solution

The fourth proportional to 928.21, 1,392.45 and 466.02 is: 699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.21 : 1,392.45 = 466.02 : x
  2. Step 2: Convert to fraction form
    928.21/1,392.45 = 466.02/x
  3. Step 3: Cross multiply
    928.21x = 1,392.45 × 466.02
  4. Step 4: Simplify right side
    928.21x = 648,909.55
  5. Step 5: Solve for x
    x = 648,909.55/928.21
  6. Step 6: Final answer
    x = 699.10

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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.