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Finding the Fourth Proportional to 275,963.16, 380,830.23 and 155,109.54

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Solution

The fourth proportional to 275,963.16, 380,830.23 and 155,109.54 is: 214,051.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,963.16 : 380,830.23 = 155,109.54 : x
  2. Step 2: Convert to fraction form
    275,963.16/380,830.23 = 155,109.54/x
  3. Step 3: Cross multiply
    275,963.16x = 380,830.23 × 155,109.54
  4. Step 4: Simplify right side
    275,963.16x = 59,070,401,793.39
  5. Step 5: Solve for x
    x = 59,070,401,793.39/275,963.16
  6. Step 6: Final answer
    x = 214,051.77

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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.