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Finding the Fourth Proportional to 621,360, 857,468.63 and 349,427.82

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Solution

The fourth proportional to 621,360, 857,468.63 and 349,427.82 is: 482,205.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,360 : 857,468.63 = 349,427.82 : x
  2. Step 2: Convert to fraction form
    621,360/857,468.63 = 349,427.82/x
  3. Step 3: Cross multiply
    621,360x = 857,468.63 × 349,427.82
  4. Step 4: Simplify right side
    621,360x = 299,623,394,972.86
  5. Step 5: Solve for x
    x = 299,623,394,972.86/621,360
  6. Step 6: Final answer
    x = 482,205.80

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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.