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Finding the Fourth Proportional to 305,857.50, 458,786.25 and 84,241.50

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Solution

The fourth proportional to 305,857.50, 458,786.25 and 84,241.50 is: 126,362.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,857.50 : 458,786.25 = 84,241.50 : x
  2. Step 2: Convert to fraction form
    305,857.50/458,786.25 = 84,241.50/x
  3. Step 3: Cross multiply
    305,857.50x = 458,786.25 × 84,241.50
  4. Step 4: Simplify right side
    305,857.50x = 38,648,841,879.38
  5. Step 5: Solve for x
    x = 38,648,841,879.38/305,857.50
  6. Step 6: Final answer
    x = 126,362.25

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1.5x scale

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.