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Finding the Fourth Proportional to 622,489.05, 859,023.23 and 380,753.87

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Solution

The fourth proportional to 622,489.05, 859,023.23 and 380,753.87 is: 525,433.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,489.05 : 859,023.23 = 380,753.87 : x
  2. Step 2: Convert to fraction form
    622,489.05/859,023.23 = 380,753.87/x
  3. Step 3: Cross multiply
    622,489.05x = 859,023.23 × 380,753.87
  4. Step 4: Simplify right side
    622,489.05x = 327,076,413,043.52
  5. Step 5: Solve for x
    x = 327,076,413,043.52/622,489.05
  6. Step 6: Final answer
    x = 525,433.20

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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.