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Finding the Fourth Proportional to 621,102.34, 857,062.14 and 363,039.78

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Solution

The fourth proportional to 621,102.34, 857,062.14 and 363,039.78 is: 500,960.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,102.34 : 857,062.14 = 363,039.78 : x
  2. Step 2: Convert to fraction form
    621,102.34/857,062.14 = 363,039.78/x
  3. Step 3: Cross multiply
    621,102.34x = 857,062.14 × 363,039.78
  4. Step 4: Simplify right side
    621,102.34x = 311,147,650,751.93
  5. Step 5: Solve for x
    x = 311,147,650,751.93/621,102.34
  6. Step 6: Final answer
    x = 500,960.36

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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.