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Finding the Fourth Proportional to 586.81, 809.79 and 321.27

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Solution

The fourth proportional to 586.81, 809.79 and 321.27 is: 443.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.81 : 809.79 = 321.27 : x
  2. Step 2: Convert to fraction form
    586.81/809.79 = 321.27/x
  3. Step 3: Cross multiply
    586.81x = 809.79 × 321.27
  4. Step 4: Simplify right side
    586.81x = 260,161.23
  5. Step 5: Solve for x
    x = 260,161.23/586.81
  6. Step 6: Final answer
    x = 443.35

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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.