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Finding the Fourth Proportional to 318,418.40, 478,664.40 and 225,567.20

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Solution

The fourth proportional to 318,418.40, 478,664.40 and 225,567.20 is: 339,085.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,418.40 : 478,664.40 = 225,567.20 : x
  2. Step 2: Convert to fraction form
    318,418.40/478,664.40 = 225,567.20/x
  3. Step 3: Cross multiply
    318,418.40x = 478,664.40 × 225,567.20
  4. Step 4: Simplify right side
    318,418.40x = 107,970,988,447.68
  5. Step 5: Solve for x
    x = 107,970,988,447.68/318,418.40
  6. Step 6: Final answer
    x = 339,085.27

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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.