Home / 1,231,634.72-1,699,639.85-687,780.06

Finding the Fourth Proportional to 1,231,634.72, 1,699,639.85 and 687,780.06

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Solution

The fourth proportional to 1,231,634.72, 1,699,639.85 and 687,780.06 is: 949,127.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,634.72 : 1,699,639.85 = 687,780.06 : x
  2. Step 2: Convert to fraction form
    1,231,634.72/1,699,639.85 = 687,780.06/x
  3. Step 3: Cross multiply
    1,231,634.72x = 1,699,639.85 × 687,780.06
  4. Step 4: Simplify right side
    1,231,634.72x = 1,168,978,394,572.49
  5. Step 5: Solve for x
    x = 1,168,978,394,572.49/1,231,634.72
  6. Step 6: Final answer
    x = 949,127.51

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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.