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Finding the Fourth Proportional to 328,755.30, 492,768.45 and 129,009.30

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Solution

The fourth proportional to 328,755.30, 492,768.45 and 129,009.30 is: 193,370.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,755.30 : 492,768.45 = 129,009.30 : x
  2. Step 2: Convert to fraction form
    328,755.30/492,768.45 = 129,009.30/x
  3. Step 3: Cross multiply
    328,755.30x = 492,768.45 × 129,009.30
  4. Step 4: Simplify right side
    328,755.30x = 63,571,712,796.59
  5. Step 5: Solve for x
    x = 63,571,712,796.59/328,755.30
  6. Step 6: Final answer
    x = 193,370.91

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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.