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Finding the Fourth Proportional to 611,090.92, 843,292.78 and 339,143.01

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Solution

The fourth proportional to 611,090.92, 843,292.78 and 339,143.01 is: 468,010.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,090.92 : 843,292.78 = 339,143.01 : x
  2. Step 2: Convert to fraction form
    611,090.92/843,292.78 = 339,143.01/x
  3. Step 3: Cross multiply
    611,090.92x = 843,292.78 × 339,143.01
  4. Step 4: Simplify right side
    611,090.92x = 285,996,851,720.47
  5. Step 5: Solve for x
    x = 285,996,851,720.47/611,090.92
  6. Step 6: Final answer
    x = 468,010.31

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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.