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Finding the Fourth Proportional to 622,195.48, 858,694.26 and 380,638.90

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Solution

The fourth proportional to 622,195.48, 858,694.26 and 380,638.90 is: 525,321.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,195.48 : 858,694.26 = 380,638.90 : x
  2. Step 2: Convert to fraction form
    622,195.48/858,694.26 = 380,638.90/x
  3. Step 3: Cross multiply
    622,195.48x = 858,694.26 × 380,638.90
  4. Step 4: Simplify right side
    622,195.48x = 326,852,438,562.71
  5. Step 5: Solve for x
    x = 326,852,438,562.71/622,195.48
  6. Step 6: Final answer
    x = 525,321.14

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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.