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Finding the Fourth Proportional to 378,721.70, 567,317.10 and 236,129.30

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Solution

The fourth proportional to 378,721.70, 567,317.10 and 236,129.30 is: 353,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,721.70 : 567,317.10 = 236,129.30 : x
  2. Step 2: Convert to fraction form
    378,721.70/567,317.10 = 236,129.30/x
  3. Step 3: Cross multiply
    378,721.70x = 567,317.10 × 236,129.30
  4. Step 4: Simplify right side
    378,721.70x = 133,960,189,701.03
  5. Step 5: Solve for x
    x = 133,960,189,701.03/378,721.70
  6. Step 6: Final answer
    x = 353,716.70

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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.