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Finding the Fourth Proportional to 393,577.58, 543,164.53 and 221,512.02

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Solution

The fourth proportional to 393,577.58, 543,164.53 and 221,512.02 is: 305,702.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,577.58 : 543,164.53 = 221,512.02 : x
  2. Step 2: Convert to fraction form
    393,577.58/543,164.53 = 221,512.02/x
  3. Step 3: Cross multiply
    393,577.58x = 543,164.53 × 221,512.02
  4. Step 4: Simplify right side
    393,577.58x = 120,317,472,232.65
  5. Step 5: Solve for x
    x = 120,317,472,232.65/393,577.58
  6. Step 6: Final answer
    x = 305,702.05

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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.