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Finding the Fourth Proportional to 928.08, 1,280.94 and 535.32

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Solution

The fourth proportional to 928.08, 1,280.94 and 535.32 is: 738.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.08 : 1,280.94 = 535.32 : x
  2. Step 2: Convert to fraction form
    928.08/1,280.94 = 535.32/x
  3. Step 3: Cross multiply
    928.08x = 1,280.94 × 535.32
  4. Step 4: Simplify right side
    928.08x = 685,712.80
  5. Step 5: Solve for x
    x = 685,712.80/928.08
  6. Step 6: Final answer
    x = 738.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.