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Finding the Fourth Proportional to 290,500.21, 400,467.78 and 203,013.69

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Solution

The fourth proportional to 290,500.21, 400,467.78 and 203,013.69 is: 279,863.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,500.21 : 400,467.78 = 203,013.69 : x
  2. Step 2: Convert to fraction form
    290,500.21/400,467.78 = 203,013.69/x
  3. Step 3: Cross multiply
    290,500.21x = 400,467.78 × 203,013.69
  4. Step 4: Simplify right side
    290,500.21x = 81,300,442,494.79
  5. Step 5: Solve for x
    x = 81,300,442,494.79/290,500.21
  6. Step 6: Final answer
    x = 279,863.63

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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.