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Finding the Fourth Proportional to 395,688.90, 546,060.85 and 242,811.56

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Solution

The fourth proportional to 395,688.90, 546,060.85 and 242,811.56 is: 335,086.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,688.90 : 546,060.85 = 242,811.56 : x
  2. Step 2: Convert to fraction form
    395,688.90/546,060.85 = 242,811.56/x
  3. Step 3: Cross multiply
    395,688.90x = 546,060.85 × 242,811.56
  4. Step 4: Simplify right side
    395,688.90x = 132,589,886,843.43
  5. Step 5: Solve for x
    x = 132,589,886,843.43/395,688.90
  6. Step 6: Final answer
    x = 335,086.19

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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.