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Finding the Fourth Proportional to 585.12, 877.55 and 219.81

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Solution

The fourth proportional to 585.12, 877.55 and 219.81 is: 329.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.12 : 877.55 = 219.81 : x
  2. Step 2: Convert to fraction form
    585.12/877.55 = 219.81/x
  3. Step 3: Cross multiply
    585.12x = 877.55 × 219.81
  4. Step 4: Simplify right side
    585.12x = 192,893.17
  5. Step 5: Solve for x
    x = 192,893.17/585.12
  6. Step 6: Final answer
    x = 329.66

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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.