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Finding the Fourth Proportional to 616,991.20, 851,491.20 and 345,084.40

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Solution

The fourth proportional to 616,991.20, 851,491.20 and 345,084.40 is: 476,240.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,991.20 : 851,491.20 = 345,084.40 : x
  2. Step 2: Convert to fraction form
    616,991.20/851,491.20 = 345,084.40/x
  3. Step 3: Cross multiply
    616,991.20x = 851,491.20 × 345,084.40
  4. Step 4: Simplify right side
    616,991.20x = 293,836,329,857.28
  5. Step 5: Solve for x
    x = 293,836,329,857.28/616,991.20
  6. Step 6: Final answer
    x = 476,240.71

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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.