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Finding the Fourth Proportional to 606,643.70, 909,965.55 and 394,067.30

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Solution

The fourth proportional to 606,643.70, 909,965.55 and 394,067.30 is: 591,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,643.70 : 909,965.55 = 394,067.30 : x
  2. Step 2: Convert to fraction form
    606,643.70/909,965.55 = 394,067.30/x
  3. Step 3: Cross multiply
    606,643.70x = 909,965.55 × 394,067.30
  4. Step 4: Simplify right side
    606,643.70x = 358,587,667,381.52
  5. Step 5: Solve for x
    x = 358,587,667,381.52/606,643.70
  6. Step 6: Final answer
    x = 591,100.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.