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Finding the Fourth Proportional to 700,004.78, 965,956.49 and 394,065.35

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Solution

The fourth proportional to 700,004.78, 965,956.49 and 394,065.35 is: 543,781.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,004.78 : 965,956.49 = 394,065.35 : x
  2. Step 2: Convert to fraction form
    700,004.78/965,956.49 = 394,065.35/x
  3. Step 3: Cross multiply
    700,004.78x = 965,956.49 × 394,065.35
  4. Step 4: Simplify right side
    700,004.78x = 380,649,977,486.84
  5. Step 5: Solve for x
    x = 380,649,977,486.84/700,004.78
  6. Step 6: Final answer
    x = 543,781.97

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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.