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Finding the Fourth Proportional to 305,485.20, 458,227.80 and 266,119.20

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Solution

The fourth proportional to 305,485.20, 458,227.80 and 266,119.20 is: 399,178.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,485.20 : 458,227.80 = 266,119.20 : x
  2. Step 2: Convert to fraction form
    305,485.20/458,227.80 = 266,119.20/x
  3. Step 3: Cross multiply
    305,485.20x = 458,227.80 × 266,119.20
  4. Step 4: Simplify right side
    305,485.20x = 121,943,215,553.76
  5. Step 5: Solve for x
    x = 121,943,215,553.76/305,485.20
  6. Step 6: Final answer
    x = 399,178.80

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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.