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Finding the Fourth Proportional to 621,078.80, 857,160.12 and 345,464.48

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Solution

The fourth proportional to 621,078.80, 857,160.12 and 345,464.48 is: 476,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,078.80 : 857,160.12 = 345,464.48 : x
  2. Step 2: Convert to fraction form
    621,078.80/857,160.12 = 345,464.48/x
  3. Step 3: Cross multiply
    621,078.80x = 857,160.12 × 345,464.48
  4. Step 4: Simplify right side
    621,078.80x = 296,118,375,132.54
  5. Step 5: Solve for x
    x = 296,118,375,132.54/621,078.80
  6. Step 6: Final answer
    x = 476,780.68

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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.