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Finding the Fourth Proportional to 928.35, 1,392.78 and 599.40

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Solution

The fourth proportional to 928.35, 1,392.78 and 599.40 is: 899.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.35 : 1,392.78 = 599.40 : x
  2. Step 2: Convert to fraction form
    928.35/1,392.78 = 599.40/x
  3. Step 3: Cross multiply
    928.35x = 1,392.78 × 599.40
  4. Step 4: Simplify right side
    928.35x = 834,832.33
  5. Step 5: Solve for x
    x = 834,832.33/928.35
  6. Step 6: Final answer
    x = 899.26

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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.