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Finding the Fourth Proportional to 449,042.68, 619,678.90 and 306,052.52

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Solution

The fourth proportional to 449,042.68, 619,678.90 and 306,052.52 is: 422,352.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,042.68 : 619,678.90 = 306,052.52 : x
  2. Step 2: Convert to fraction form
    449,042.68/619,678.90 = 306,052.52/x
  3. Step 3: Cross multiply
    449,042.68x = 619,678.90 × 306,052.52
  4. Step 4: Simplify right side
    449,042.68x = 189,654,288,935.83
  5. Step 5: Solve for x
    x = 189,654,288,935.83/449,042.68
  6. Step 6: Final answer
    x = 422,352.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.