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Finding the Fourth Proportional to 395,680.67, 545,967.42 and 221,254.02

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Solution

The fourth proportional to 395,680.67, 545,967.42 and 221,254.02 is: 305,290.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,680.67 : 545,967.42 = 221,254.02 : x
  2. Step 2: Convert to fraction form
    395,680.67/545,967.42 = 221,254.02/x
  3. Step 3: Cross multiply
    395,680.67x = 545,967.42 × 221,254.02
  4. Step 4: Simplify right side
    395,680.67x = 120,797,486,464.03
  5. Step 5: Solve for x
    x = 120,797,486,464.03/395,680.67
  6. Step 6: Final answer
    x = 305,290.34

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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.