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Finding the Fourth Proportional to 1,918,398.36, 2,647,411.56 and 1,058,959.02

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Solution

The fourth proportional to 1,918,398.36, 2,647,411.56 and 1,058,959.02 is: 1,461,375.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,398.36 : 2,647,411.56 = 1,058,959.02 : x
  2. Step 2: Convert to fraction form
    1,918,398.36/2,647,411.56 = 1,058,959.02/x
  3. Step 3: Cross multiply
    1,918,398.36x = 2,647,411.56 × 1,058,959.02
  4. Step 4: Simplify right side
    1,918,398.36x = 2,803,500,351,114.27
  5. Step 5: Solve for x
    x = 2,803,500,351,114.27/1,918,398.36
  6. Step 6: Final answer
    x = 1,461,375.49

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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.