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Finding the Fourth Proportional to 479,420.96, 661,638.32 and 275,543.05

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Solution

The fourth proportional to 479,420.96, 661,638.32 and 275,543.05 is: 380,270.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,420.96 : 661,638.32 = 275,543.05 : x
  2. Step 2: Convert to fraction form
    479,420.96/661,638.32 = 275,543.05/x
  3. Step 3: Cross multiply
    479,420.96x = 661,638.32 × 275,543.05
  4. Step 4: Simplify right side
    479,420.96x = 182,309,840,689.68
  5. Step 5: Solve for x
    x = 182,309,840,689.68/479,420.96
  6. Step 6: Final answer
    x = 380,270.90

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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.