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Finding the Fourth Proportional to 555,643.74, 766,791.96 and 300,994.74

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Solution

The fourth proportional to 555,643.74, 766,791.96 and 300,994.74 is: 415,374.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,643.74 : 766,791.96 = 300,994.74 : x
  2. Step 2: Convert to fraction form
    555,643.74/766,791.96 = 300,994.74/x
  3. Step 3: Cross multiply
    555,643.74x = 766,791.96 × 300,994.74
  4. Step 4: Simplify right side
    555,643.74x = 230,800,346,634.29
  5. Step 5: Solve for x
    x = 230,800,346,634.29/555,643.74
  6. Step 6: Final answer
    x = 415,374.69

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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.