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Finding the Fourth Proportional to 413,603.20, 620,404.80 and 203,651.20

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Solution

The fourth proportional to 413,603.20, 620,404.80 and 203,651.20 is: 305,476.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,603.20 : 620,404.80 = 203,651.20 : x
  2. Step 2: Convert to fraction form
    413,603.20/620,404.80 = 203,651.20/x
  3. Step 3: Cross multiply
    413,603.20x = 620,404.80 × 203,651.20
  4. Step 4: Simplify right side
    413,603.20x = 126,346,182,005.76
  5. Step 5: Solve for x
    x = 126,346,182,005.76/413,603.20
  6. Step 6: Final answer
    x = 305,476.80

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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.