Home / 387,431.64-534,669.42-217,662.36

Finding the Fourth Proportional to 387,431.64, 534,669.42 and 217,662.36

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Solution

The fourth proportional to 387,431.64, 534,669.42 and 217,662.36 is: 300,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,431.64 : 534,669.42 = 217,662.36 : x
  2. Step 2: Convert to fraction form
    387,431.64/534,669.42 = 217,662.36/x
  3. Step 3: Cross multiply
    387,431.64x = 534,669.42 × 217,662.36
  4. Step 4: Simplify right side
    387,431.64x = 116,377,407,777.03
  5. Step 5: Solve for x
    x = 116,377,407,777.03/387,431.64
  6. Step 6: Final answer
    x = 300,381.79

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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.