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Finding the Fourth Proportional to 303,485.20, 455,227.80 and 146,021.20

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Solution

The fourth proportional to 303,485.20, 455,227.80 and 146,021.20 is: 219,031.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,485.20 : 455,227.80 = 146,021.20 : x
  2. Step 2: Convert to fraction form
    303,485.20/455,227.80 = 146,021.20/x
  3. Step 3: Cross multiply
    303,485.20x = 455,227.80 × 146,021.20
  4. Step 4: Simplify right side
    303,485.20x = 66,472,909,629.36
  5. Step 5: Solve for x
    x = 66,472,909,629.36/303,485.20
  6. Step 6: Final answer
    x = 219,031.80

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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.