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Finding the Fourth Proportional to 420,989.29, 631,058.43 and 181,259.56

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Solution

The fourth proportional to 420,989.29, 631,058.43 and 181,259.56 is: 271,706.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,989.29 : 631,058.43 = 181,259.56 : x
  2. Step 2: Convert to fraction form
    420,989.29/631,058.43 = 181,259.56/x
  3. Step 3: Cross multiply
    420,989.29x = 631,058.43 × 181,259.56
  4. Step 4: Simplify right side
    420,989.29x = 114,385,373,356.09
  5. Step 5: Solve for x
    x = 114,385,373,356.09/420,989.29
  6. Step 6: Final answer
    x = 271,706.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.