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Finding the Fourth Proportional to 585.55, 878.09 and 220.14

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Solution

The fourth proportional to 585.55, 878.09 and 220.14 is: 330.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.55 : 878.09 = 220.14 : x
  2. Step 2: Convert to fraction form
    585.55/878.09 = 220.14/x
  3. Step 3: Cross multiply
    585.55x = 878.09 × 220.14
  4. Step 4: Simplify right side
    585.55x = 193,303.83
  5. Step 5: Solve for x
    x = 193,303.83/585.55
  6. Step 6: Final answer
    x = 330.12

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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.