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Finding the Fourth Proportional to 405,381.12, 608,064.00 and 121,072.49

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Solution

The fourth proportional to 405,381.12, 608,064.00 and 121,072.49 is: 181,606.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,381.12 : 608,064.00 = 121,072.49 : x
  2. Step 2: Convert to fraction form
    405,381.12/608,064.00 = 121,072.49/x
  3. Step 3: Cross multiply
    405,381.12x = 608,064.00 × 121,072.49
  4. Step 4: Simplify right side
    405,381.12x = 73,619,822,755.59
  5. Step 5: Solve for x
    x = 73,619,822,755.59/405,381.12
  6. Step 6: Final answer
    x = 181,606.44

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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.