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Finding the Fourth Proportional to 928.64, 1,391.74 and 599.48

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Solution

The fourth proportional to 928.64, 1,391.74 and 599.48 is: 898.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.64 : 1,391.74 = 599.48 : x
  2. Step 2: Convert to fraction form
    928.64/1,391.74 = 599.48/x
  3. Step 3: Cross multiply
    928.64x = 1,391.74 × 599.48
  4. Step 4: Simplify right side
    928.64x = 834,320.30
  5. Step 5: Solve for x
    x = 834,320.30/928.64
  6. Step 6: Final answer
    x = 898.43

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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.