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Finding the Fourth Proportional to 285,043.20, 428,601.60 and 278,822.40

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Solution

The fourth proportional to 285,043.20, 428,601.60 and 278,822.40 is: 419,247.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,043.20 : 428,601.60 = 278,822.40 : x
  2. Step 2: Convert to fraction form
    285,043.20/428,601.60 = 278,822.40/x
  3. Step 3: Cross multiply
    285,043.20x = 428,601.60 × 278,822.40
  4. Step 4: Simplify right side
    285,043.20x = 119,503,726,755.84
  5. Step 5: Solve for x
    x = 119,503,726,755.84/285,043.20
  6. Step 6: Final answer
    x = 419,247.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.