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Finding the Fourth Proportional to 621,129.39, 857,153.37 and 349,198.50

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Solution

The fourth proportional to 621,129.39, 857,153.37 and 349,198.50 is: 481,891.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,129.39 : 857,153.37 = 349,198.50 : x
  2. Step 2: Convert to fraction form
    621,129.39/857,153.37 = 349,198.50/x
  3. Step 3: Cross multiply
    621,129.39x = 857,153.37 × 349,198.50
  4. Step 4: Simplify right side
    621,129.39x = 299,316,671,073.95
  5. Step 5: Solve for x
    x = 299,316,671,073.95/621,129.39
  6. Step 6: Final answer
    x = 481,891.01

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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.