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Finding the Fourth Proportional to 618.50, 851.84 and 575.46

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Solution

The fourth proportional to 618.50, 851.84 and 575.46 is: 792.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.50 : 851.84 = 575.46 : x
  2. Step 2: Convert to fraction form
    618.50/851.84 = 575.46/x
  3. Step 3: Cross multiply
    618.50x = 851.84 × 575.46
  4. Step 4: Simplify right side
    618.50x = 490,199.85
  5. Step 5: Solve for x
    x = 490,199.85/618.50
  6. Step 6: Final answer
    x = 792.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.