Home / 1,231,645.84-1,699,667.91-687,777.21

Finding the Fourth Proportional to 1,231,645.84, 1,699,667.91 and 687,777.21

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Solution

The fourth proportional to 1,231,645.84, 1,699,667.91 and 687,777.21 is: 949,130.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,645.84 : 1,699,667.91 = 687,777.21 : x
  2. Step 2: Convert to fraction form
    1,231,645.84/1,699,667.91 = 687,777.21/x
  3. Step 3: Cross multiply
    1,231,645.84x = 1,699,667.91 × 687,777.21
  4. Step 4: Simplify right side
    1,231,645.84x = 1,168,992,853,066.33
  5. Step 5: Solve for x
    x = 1,168,992,853,066.33/1,231,645.84
  6. Step 6: Final answer
    x = 949,130.68

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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.