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Finding the Fourth Proportional to 404,313.35, 605,978.06 and 286,018.79

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Solution

The fourth proportional to 404,313.35, 605,978.06 and 286,018.79 is: 428,680.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,313.35 : 605,978.06 = 286,018.79 : x
  2. Step 2: Convert to fraction form
    404,313.35/605,978.06 = 286,018.79/x
  3. Step 3: Cross multiply
    404,313.35x = 605,978.06 × 286,018.79
  4. Step 4: Simplify right side
    404,313.35x = 173,321,107,027.76
  5. Step 5: Solve for x
    x = 173,321,107,027.76/404,313.35
  6. Step 6: Final answer
    x = 428,680.15

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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.