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Finding the Fourth Proportional to 403,418.60, 606,440.10 and 285,903.80

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Solution

The fourth proportional to 403,418.60, 606,440.10 and 285,903.80 is: 429,785.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,418.60 : 606,440.10 = 285,903.80 : x
  2. Step 2: Convert to fraction form
    403,418.60/606,440.10 = 285,903.80/x
  3. Step 3: Cross multiply
    403,418.60x = 606,440.10 × 285,903.80
  4. Step 4: Simplify right side
    403,418.60x = 173,383,529,062.38
  5. Step 5: Solve for x
    x = 173,383,529,062.38/403,418.60
  6. Step 6: Final answer
    x = 429,785.66

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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.