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Finding the Fourth Proportional to 619,763.20, 855,290.24 and 347,848

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Solution

The fourth proportional to 619,763.20, 855,290.24 and 347,848 is: 480,039.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,763.20 : 855,290.24 = 347,848 : x
  2. Step 2: Convert to fraction form
    619,763.20/855,290.24 = 347,848/x
  3. Step 3: Cross multiply
    619,763.20x = 855,290.24 × 347,848
  4. Step 4: Simplify right side
    619,763.20x = 297,510,999,403.52
  5. Step 5: Solve for x
    x = 297,510,999,403.52/619,763.20
  6. Step 6: Final answer
    x = 480,039.79

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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.