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Finding the Fourth Proportional to 586.89, 880.61 and 221.81

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Solution

The fourth proportional to 586.89, 880.61 and 221.81 is: 332.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.89 : 880.61 = 221.81 : x
  2. Step 2: Convert to fraction form
    586.89/880.61 = 221.81/x
  3. Step 3: Cross multiply
    586.89x = 880.61 × 221.81
  4. Step 4: Simplify right side
    586.89x = 195,322.59
  5. Step 5: Solve for x
    x = 195,322.59/586.89
  6. Step 6: Final answer
    x = 332.81

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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.