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Finding the Fourth Proportional to 928.08, 1,280.58 and 535.14

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Solution

The fourth proportional to 928.08, 1,280.58 and 535.14 is: 738.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.08 : 1,280.58 = 535.14 : x
  2. Step 2: Convert to fraction form
    928.08/1,280.58 = 535.14/x
  3. Step 3: Cross multiply
    928.08x = 1,280.58 × 535.14
  4. Step 4: Simplify right side
    928.08x = 685,289.58
  5. Step 5: Solve for x
    x = 685,289.58/928.08
  6. Step 6: Final answer
    x = 738.39

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1.5x scale

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.