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Finding the Fourth Proportional to 275,787.90, 380,631.59 and 257,777.96

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Solution

The fourth proportional to 275,787.90, 380,631.59 and 257,777.96 is: 355,774.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,787.90 : 380,631.59 = 257,777.96 : x
  2. Step 2: Convert to fraction form
    275,787.90/380,631.59 = 257,777.96/x
  3. Step 3: Cross multiply
    275,787.90x = 380,631.59 × 257,777.96
  4. Step 4: Simplify right side
    275,787.90x = 98,118,432,556.38
  5. Step 5: Solve for x
    x = 98,118,432,556.38/275,787.90
  6. Step 6: Final answer
    x = 355,774.97

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1.5x scale

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.