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Finding the Fourth Proportional to 309,393.42, 464,090.54 and 84,755.85

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Solution

The fourth proportional to 309,393.42, 464,090.54 and 84,755.85 is: 127,133.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,393.42 : 464,090.54 = 84,755.85 : x
  2. Step 2: Convert to fraction form
    309,393.42/464,090.54 = 84,755.85/x
  3. Step 3: Cross multiply
    309,393.42x = 464,090.54 × 84,755.85
  4. Step 4: Simplify right side
    309,393.42x = 39,334,387,770.88
  5. Step 5: Solve for x
    x = 39,334,387,770.88/309,393.42
  6. Step 6: Final answer
    x = 127,133.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.