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Finding the Fourth Proportional to 618.72, 928.44 and 523.68

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Solution

The fourth proportional to 618.72, 928.44 and 523.68 is: 785.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.72 : 928.44 = 523.68 : x
  2. Step 2: Convert to fraction form
    618.72/928.44 = 523.68/x
  3. Step 3: Cross multiply
    618.72x = 928.44 × 523.68
  4. Step 4: Simplify right side
    618.72x = 486,205.46
  5. Step 5: Solve for x
    x = 486,205.46/618.72
  6. Step 6: Final answer
    x = 785.82

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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.