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Finding the Fourth Proportional to 275,543.79, 380,250.21 and 154,685.31

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Solution

The fourth proportional to 275,543.79, 380,250.21 and 154,685.31 is: 213,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,543.79 : 380,250.21 = 154,685.31 : x
  2. Step 2: Convert to fraction form
    275,543.79/380,250.21 = 154,685.31/x
  3. Step 3: Cross multiply
    275,543.79x = 380,250.21 × 154,685.31
  4. Step 4: Simplify right side
    275,543.79x = 58,819,121,611.42
  5. Step 5: Solve for x
    x = 58,819,121,611.42/275,543.79
  6. Step 6: Final answer
    x = 213,465.60

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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.