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Finding the Fourth Proportional to 275,987.34, 380,873.32 and 155,128.26

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Solution

The fourth proportional to 275,987.34, 380,873.32 and 155,128.26 is: 214,083.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,987.34 : 380,873.32 = 155,128.26 : x
  2. Step 2: Convert to fraction form
    275,987.34/380,873.32 = 155,128.26/x
  3. Step 3: Cross multiply
    275,987.34x = 380,873.32 × 155,128.26
  4. Step 4: Simplify right side
    275,987.34x = 59,084,215,412.02
  5. Step 5: Solve for x
    x = 59,084,215,412.02/275,987.34
  6. Step 6: Final answer
    x = 214,083.06

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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.