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Finding the Fourth Proportional to 275,843.16, 380,640 and 154,974.96

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Solution

The fourth proportional to 275,843.16, 380,640 and 154,974.96 is: 213,852.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,843.16 : 380,640 = 154,974.96 : x
  2. Step 2: Convert to fraction form
    275,843.16/380,640 = 154,974.96/x
  3. Step 3: Cross multiply
    275,843.16x = 380,640 × 154,974.96
  4. Step 4: Simplify right side
    275,843.16x = 58,989,668,774.40
  5. Step 5: Solve for x
    x = 58,989,668,774.40/275,843.16
  6. Step 6: Final answer
    x = 213,852.21

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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.