Home / 1,138,305-1,707,524.31-428,339.16

Finding the Fourth Proportional to 1,138,305, 1,707,524.31 and 428,339.16

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Solution

The fourth proportional to 1,138,305, 1,707,524.31 and 428,339.16 is: 642,533.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138,305 : 1,707,524.31 = 428,339.16 : x
  2. Step 2: Convert to fraction form
    1,138,305/1,707,524.31 = 428,339.16/x
  3. Step 3: Cross multiply
    1,138,305x = 1,707,524.31 × 428,339.16
  4. Step 4: Simplify right side
    1,138,305x = 731,399,528,624.98
  5. Step 5: Solve for x
    x = 731,399,528,624.98/1,138,305
  6. Step 6: Final answer
    x = 642,533.88

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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.