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Finding the Fourth Proportional to 301,285.80, 451,945.98 and 90,945

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Solution

The fourth proportional to 301,285.80, 451,945.98 and 90,945 is: 136,422.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    301,285.80 : 451,945.98 = 90,945 : x
  2. Step 2: Convert to fraction form
    301,285.80/451,945.98 = 90,945/x
  3. Step 3: Cross multiply
    301,285.80x = 451,945.98 × 90,945
  4. Step 4: Simplify right side
    301,285.80x = 41,102,227,151.10
  5. Step 5: Solve for x
    x = 41,102,227,151.10/301,285.80
  6. Step 6: Final answer
    x = 136,422.72

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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.