Home / 1,387,339.80-2,081,009.70-722,405.40

Finding the Fourth Proportional to 1,387,339.80, 2,081,009.70 and 722,405.40

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Solution

The fourth proportional to 1,387,339.80, 2,081,009.70 and 722,405.40 is: 1,083,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,339.80 : 2,081,009.70 = 722,405.40 : x
  2. Step 2: Convert to fraction form
    1,387,339.80/2,081,009.70 = 722,405.40/x
  3. Step 3: Cross multiply
    1,387,339.80x = 2,081,009.70 × 722,405.40
  4. Step 4: Simplify right side
    1,387,339.80x = 1,503,332,644,732.38
  5. Step 5: Solve for x
    x = 1,503,332,644,732.38/1,387,339.80
  6. Step 6: Final answer
    x = 1,083,608.10

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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.