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Finding the Fourth Proportional to 331,846.40, 497,769.60 and 280,006.40

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Solution

The fourth proportional to 331,846.40, 497,769.60 and 280,006.40 is: 420,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,846.40 : 497,769.60 = 280,006.40 : x
  2. Step 2: Convert to fraction form
    331,846.40/497,769.60 = 280,006.40/x
  3. Step 3: Cross multiply
    331,846.40x = 497,769.60 × 280,006.40
  4. Step 4: Simplify right side
    331,846.40x = 139,378,673,725.44
  5. Step 5: Solve for x
    x = 139,378,673,725.44/331,846.40
  6. Step 6: Final answer
    x = 420,009.60

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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.