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Finding the Fourth Proportional to 494,072.55, 681,802.35 and 279,207.90

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Solution

The fourth proportional to 494,072.55, 681,802.35 and 279,207.90 is: 385,296.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,072.55 : 681,802.35 = 279,207.90 : x
  2. Step 2: Convert to fraction form
    494,072.55/681,802.35 = 279,207.90/x
  3. Step 3: Cross multiply
    494,072.55x = 681,802.35 × 279,207.90
  4. Step 4: Simplify right side
    494,072.55x = 190,364,602,358.57
  5. Step 5: Solve for x
    x = 190,364,602,358.57/494,072.55
  6. Step 6: Final answer
    x = 385,296.86

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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.