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Finding the Fourth Proportional to 393,445.22, 542,954.39 and 223,679.34

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Solution

The fourth proportional to 393,445.22, 542,954.39 and 223,679.34 is: 308,677.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,445.22 : 542,954.39 = 223,679.34 : x
  2. Step 2: Convert to fraction form
    393,445.22/542,954.39 = 223,679.34/x
  3. Step 3: Cross multiply
    393,445.22x = 542,954.39 × 223,679.34
  4. Step 4: Simplify right side
    393,445.22x = 121,447,678,486.91
  5. Step 5: Solve for x
    x = 121,447,678,486.91/393,445.22
  6. Step 6: Final answer
    x = 308,677.48

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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.