Home / 1,387,695.71-2,081,739.24-428,229.41

Finding the Fourth Proportional to 1,387,695.71, 2,081,739.24 and 428,229.41

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Solution

The fourth proportional to 1,387,695.71, 2,081,739.24 and 428,229.41 is: 642,404.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,695.71 : 2,081,739.24 = 428,229.41 : x
  2. Step 2: Convert to fraction form
    1,387,695.71/2,081,739.24 = 428,229.41/x
  3. Step 3: Cross multiply
    1,387,695.71x = 2,081,739.24 × 428,229.41
  4. Step 4: Simplify right side
    1,387,695.71x = 891,461,956,110.35
  5. Step 5: Solve for x
    x = 891,461,956,110.35/1,387,695.71
  6. Step 6: Final answer
    x = 642,404.49

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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.