Home / 1,387,190.88-1,913,556.96-1,129,345.20

Finding the Fourth Proportional to 1,387,190.88, 1,913,556.96 and 1,129,345.20

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Solution

The fourth proportional to 1,387,190.88, 1,913,556.96 and 1,129,345.20 is: 1,557,872.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,190.88 : 1,913,556.96 = 1,129,345.20 : x
  2. Step 2: Convert to fraction form
    1,387,190.88/1,913,556.96 = 1,129,345.20/x
  3. Step 3: Cross multiply
    1,387,190.88x = 1,913,556.96 × 1,129,345.20
  4. Step 4: Simplify right side
    1,387,190.88x = 2,161,066,367,702.59
  5. Step 5: Solve for x
    x = 2,161,066,367,702.59/1,387,190.88
  6. Step 6: Final answer
    x = 1,557,872.39

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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.