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Finding the Fourth Proportional to 394,978.08, 545,134.96 and 242,101.32

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Solution

The fourth proportional to 394,978.08, 545,134.96 and 242,101.32 is: 334,139.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,978.08 : 545,134.96 = 242,101.32 : x
  2. Step 2: Convert to fraction form
    394,978.08/545,134.96 = 242,101.32/x
  3. Step 3: Cross multiply
    394,978.08x = 545,134.96 × 242,101.32
  4. Step 4: Simplify right side
    394,978.08x = 131,977,893,394.15
  5. Step 5: Solve for x
    x = 131,977,893,394.15/394,978.08
  6. Step 6: Final answer
    x = 334,139.79

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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.