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Finding the Fourth Proportional to 618.94, 928.88 and 479.78

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Solution

The fourth proportional to 618.94, 928.88 and 479.78 is: 720.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.94 : 928.88 = 479.78 : x
  2. Step 2: Convert to fraction form
    618.94/928.88 = 479.78/x
  3. Step 3: Cross multiply
    618.94x = 928.88 × 479.78
  4. Step 4: Simplify right side
    618.94x = 445,652.40
  5. Step 5: Solve for x
    x = 445,652.40/618.94
  6. Step 6: Final answer
    x = 720.03

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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.