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Finding the Fourth Proportional to 618.89, 928.33 and 481.55

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Solution

The fourth proportional to 618.89, 928.33 and 481.55 is: 722.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.89 : 928.33 = 481.55 : x
  2. Step 2: Convert to fraction form
    618.89/928.33 = 481.55/x
  3. Step 3: Cross multiply
    618.89x = 928.33 × 481.55
  4. Step 4: Simplify right side
    618.89x = 447,031.47
  5. Step 5: Solve for x
    x = 447,031.47/618.89
  6. Step 6: Final answer
    x = 722.32

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1.5x scale

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.