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Finding the Fourth Proportional to 618.21, 851.40 and 586.89

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Solution

The fourth proportional to 618.21, 851.40 and 586.89 is: 808.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.21 : 851.40 = 586.89 : x
  2. Step 2: Convert to fraction form
    618.21/851.40 = 586.89/x
  3. Step 3: Cross multiply
    618.21x = 851.40 × 586.89
  4. Step 4: Simplify right side
    618.21x = 499,678.15
  5. Step 5: Solve for x
    x = 499,678.15/618.21
  6. Step 6: Final answer
    x = 808.27

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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.