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Finding the Fourth Proportional to 403,319.38, 605,352.91 and 203,780.01

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Solution

The fourth proportional to 403,319.38, 605,352.91 and 203,780.01 is: 305,858.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,319.38 : 605,352.91 = 203,780.01 : x
  2. Step 2: Convert to fraction form
    403,319.38/605,352.91 = 203,780.01/x
  3. Step 3: Cross multiply
    403,319.38x = 605,352.91 × 203,780.01
  4. Step 4: Simplify right side
    403,319.38x = 123,358,820,037.98
  5. Step 5: Solve for x
    x = 123,358,820,037.98/403,319.38
  6. Step 6: Final answer
    x = 305,858.90

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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.