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Finding the Fourth Proportional to 618.63, 928.55 and 454.60

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Solution

The fourth proportional to 618.63, 928.55 and 454.60 is: 682.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.63 : 928.55 = 454.60 : x
  2. Step 2: Convert to fraction form
    618.63/928.55 = 454.60/x
  3. Step 3: Cross multiply
    618.63x = 928.55 × 454.60
  4. Step 4: Simplify right side
    618.63x = 422,118.83
  5. Step 5: Solve for x
    x = 422,118.83/618.63
  6. Step 6: Final answer
    x = 682.34

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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.