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Finding the Fourth Proportional to 485,957.54, 670,538.34 and 281,961.69

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Solution

The fourth proportional to 485,957.54, 670,538.34 and 281,961.69 is: 389,058.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,957.54 : 670,538.34 = 281,961.69 : x
  2. Step 2: Convert to fraction form
    485,957.54/670,538.34 = 281,961.69/x
  3. Step 3: Cross multiply
    485,957.54x = 670,538.34 × 281,961.69
  4. Step 4: Simplify right side
    485,957.54x = 189,066,123,556.20
  5. Step 5: Solve for x
    x = 189,066,123,556.20/485,957.54
  6. Step 6: Final answer
    x = 389,058.94

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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.