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Finding the Fourth Proportional to 579,696.62, 799,980.60 and 321,612.72

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Solution

The fourth proportional to 579,696.62, 799,980.60 and 321,612.72 is: 443,825.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,696.62 : 799,980.60 = 321,612.72 : x
  2. Step 2: Convert to fraction form
    579,696.62/799,980.60 = 321,612.72/x
  3. Step 3: Cross multiply
    579,696.62x = 799,980.60 × 321,612.72
  4. Step 4: Simplify right side
    579,696.62x = 257,283,936,713.23
  5. Step 5: Solve for x
    x = 257,283,936,713.23/579,696.62
  6. Step 6: Final answer
    x = 443,825.15

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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.