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Finding the Fourth Proportional to 621,072.84, 857,114.26 and 345,459.80

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Solution

The fourth proportional to 621,072.84, 857,114.26 and 345,459.80 is: 476,753.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,072.84 : 857,114.26 = 345,459.80 : x
  2. Step 2: Convert to fraction form
    621,072.84/857,114.26 = 345,459.80/x
  3. Step 3: Cross multiply
    621,072.84x = 857,114.26 × 345,459.80
  4. Step 4: Simplify right side
    621,072.84x = 296,098,520,836.75
  5. Step 5: Solve for x
    x = 296,098,520,836.75/621,072.84
  6. Step 6: Final answer
    x = 476,753.29

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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.