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Finding the Fourth Proportional to 1,405,080, 2,107,620 and 518,616

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Solution

The fourth proportional to 1,405,080, 2,107,620 and 518,616 is: 777,924

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,405,080 : 2,107,620 = 518,616 : x
  2. Step 2: Convert to fraction form
    1,405,080/2,107,620 = 518,616/x
  3. Step 3: Cross multiply
    1,405,080x = 2,107,620 × 518,616
  4. Step 4: Simplify right side
    1,405,080x = 1,093,045,453,920
  5. Step 5: Solve for x
    x = 1,093,045,453,920/1,405,080
  6. Step 6: Final answer
    x = 777,924

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.