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Finding the Fourth Proportional to 275,918.79, 380,801.75 and 155,065.17

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Solution

The fourth proportional to 275,918.79, 380,801.75 and 155,065.17 is: 214,008.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,918.79 : 380,801.75 = 155,065.17 : x
  2. Step 2: Convert to fraction form
    275,918.79/380,801.75 = 155,065.17/x
  3. Step 3: Cross multiply
    275,918.79x = 380,801.75 × 155,065.17
  4. Step 4: Simplify right side
    275,918.79x = 59,049,087,324.72
  5. Step 5: Solve for x
    x = 59,049,087,324.72/275,918.79
  6. Step 6: Final answer
    x = 214,008.94

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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.