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Finding the Fourth Proportional to 245,990.90, 339,344.96 and 165,421.82

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Solution

The fourth proportional to 245,990.90, 339,344.96 and 165,421.82 is: 228,199.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,990.90 : 339,344.96 = 165,421.82 : x
  2. Step 2: Convert to fraction form
    245,990.90/339,344.96 = 165,421.82/x
  3. Step 3: Cross multiply
    245,990.90x = 339,344.96 × 165,421.82
  4. Step 4: Simplify right side
    245,990.90x = 56,135,060,891.03
  5. Step 5: Solve for x
    x = 56,135,060,891.03/245,990.90
  6. Step 6: Final answer
    x = 228,199.75

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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.