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Finding the Fourth Proportional to 397,641.22, 548,564.07 and 236,404.78

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Solution

The fourth proportional to 397,641.22, 548,564.07 and 236,404.78 is: 326,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,641.22 : 548,564.07 = 236,404.78 : x
  2. Step 2: Convert to fraction form
    397,641.22/548,564.07 = 236,404.78/x
  3. Step 3: Cross multiply
    397,641.22x = 548,564.07 × 236,404.78
  4. Step 4: Simplify right side
    397,641.22x = 129,683,168,284.26
  5. Step 5: Solve for x
    x = 129,683,168,284.26/397,641.22
  6. Step 6: Final answer
    x = 326,131.10

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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.