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Finding the Fourth Proportional to 310,003.62, 427,790.43 and 172,191.49

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Solution

The fourth proportional to 310,003.62, 427,790.43 and 172,191.49 is: 237,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,003.62 : 427,790.43 = 172,191.49 : x
  2. Step 2: Convert to fraction form
    310,003.62/427,790.43 = 172,191.49/x
  3. Step 3: Cross multiply
    310,003.62x = 427,790.43 × 172,191.49
  4. Step 4: Simplify right side
    310,003.62x = 73,661,871,549.44
  5. Step 5: Solve for x
    x = 73,661,871,549.44/310,003.62
  6. Step 6: Final answer
    x = 237,616.17

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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.