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Finding the Fourth Proportional to 382,774.62, 528,194.61 and 221,640.60

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Solution

The fourth proportional to 382,774.62, 528,194.61 and 221,640.60 is: 305,844.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,774.62 : 528,194.61 = 221,640.60 : x
  2. Step 2: Convert to fraction form
    382,774.62/528,194.61 = 221,640.60/x
  3. Step 3: Cross multiply
    382,774.62x = 528,194.61 × 221,640.60
  4. Step 4: Simplify right side
    382,774.62x = 117,069,370,277.17
  5. Step 5: Solve for x
    x = 117,069,370,277.17/382,774.62
  6. Step 6: Final answer
    x = 305,844.13

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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.