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Finding the Fourth Proportional to 928.80, 1,399.77 and 884.88

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Solution

The fourth proportional to 928.80, 1,399.77 and 884.88 is: 1,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    928.80 : 1,399.77 = 884.88 : x
  2. Step 2: Convert to fraction form
    928.80/1,399.77 = 884.88/x
  3. Step 3: Cross multiply
    928.80x = 1,399.77 × 884.88
  4. Step 4: Simplify right side
    928.80x = 1,238,628.48
  5. Step 5: Solve for x
    x = 1,238,628.48/928.80
  6. Step 6: Final answer
    x = 1,333.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.