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Finding the Fourth Proportional to 493,853.76, 681,514.56 and 278,989.92

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Solution

The fourth proportional to 493,853.76, 681,514.56 and 278,989.92 is: 385,004.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,853.76 : 681,514.56 = 278,989.92 : x
  2. Step 2: Convert to fraction form
    493,853.76/681,514.56 = 278,989.92/x
  3. Step 3: Cross multiply
    493,853.76x = 681,514.56 × 278,989.92
  4. Step 4: Simplify right side
    493,853.76x = 190,135,692,573.24
  5. Step 5: Solve for x
    x = 190,135,692,573.24/493,853.76
  6. Step 6: Final answer
    x = 385,004.04

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1.5x scale

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.