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Finding the Fourth Proportional to 493,612.80, 681,112.17 and 278,748.60

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Solution

The fourth proportional to 493,612.80, 681,112.17 and 278,748.60 is: 384,631.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,612.80 : 681,112.17 = 278,748.60 : x
  2. Step 2: Convert to fraction form
    493,612.80/681,112.17 = 278,748.60/x
  3. Step 3: Cross multiply
    493,612.80x = 681,112.17 × 278,748.60
  4. Step 4: Simplify right side
    493,612.80x = 189,859,063,830.46
  5. Step 5: Solve for x
    x = 189,859,063,830.46/493,612.80
  6. Step 6: Final answer
    x = 384,631.57

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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.