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Finding the Fourth Proportional to 479,694.56, 662,034.56 and 398,979.68

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Solution

The fourth proportional to 479,694.56, 662,034.56 and 398,979.68 is: 550,638.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,694.56 : 662,034.56 = 398,979.68 : x
  2. Step 2: Convert to fraction form
    479,694.56/662,034.56 = 398,979.68/x
  3. Step 3: Cross multiply
    479,694.56x = 662,034.56 × 398,979.68
  4. Step 4: Simplify right side
    479,694.56x = 264,138,336,897.74
  5. Step 5: Solve for x
    x = 264,138,336,897.74/479,694.56
  6. Step 6: Final answer
    x = 550,638.59

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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.