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Finding the Fourth Proportional to 285,396.94, 393,850.67 and 172,197.82

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Solution

The fourth proportional to 285,396.94, 393,850.67 and 172,197.82 is: 237,634.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,396.94 : 393,850.67 = 172,197.82 : x
  2. Step 2: Convert to fraction form
    285,396.94/393,850.67 = 172,197.82/x
  3. Step 3: Cross multiply
    285,396.94x = 393,850.67 × 172,197.82
  4. Step 4: Simplify right side
    285,396.94x = 67,820,226,779.54
  5. Step 5: Solve for x
    x = 67,820,226,779.54/285,396.94
  6. Step 6: Final answer
    x = 237,634.74

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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.