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Finding the Fourth Proportional to 426,027.22, 638,554.91 and 266,176.66

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Solution

The fourth proportional to 426,027.22, 638,554.91 and 266,176.66 is: 398,961.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,027.22 : 638,554.91 = 266,176.66 : x
  2. Step 2: Convert to fraction form
    426,027.22/638,554.91 = 266,176.66/x
  3. Step 3: Cross multiply
    426,027.22x = 638,554.91 × 266,176.66
  4. Step 4: Simplify right side
    426,027.22x = 169,968,410,018.80
  5. Step 5: Solve for x
    x = 169,968,410,018.80/426,027.22
  6. Step 6: Final answer
    x = 398,961.39

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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.