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Finding the Fourth Proportional to 611,090.79, 843,292.61 and 339,142.89

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Solution

The fourth proportional to 611,090.79, 843,292.61 and 339,142.89 is: 468,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,090.79 : 843,292.61 = 339,142.89 : x
  2. Step 2: Convert to fraction form
    611,090.79/843,292.61 = 339,142.89/x
  3. Step 3: Cross multiply
    611,090.79x = 843,292.61 × 339,142.89
  4. Step 4: Simplify right side
    611,090.79x = 285,996,691,175.33
  5. Step 5: Solve for x
    x = 285,996,691,175.33/611,090.79
  6. Step 6: Final answer
    x = 468,010.15

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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.