Home / 1,231,917.85-1,699,936.02-687,978.16

Finding the Fourth Proportional to 1,231,917.85, 1,699,936.02 and 687,978.16

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Solution

The fourth proportional to 1,231,917.85, 1,699,936.02 and 687,978.16 is: 949,348.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,917.85 : 1,699,936.02 = 687,978.16 : x
  2. Step 2: Convert to fraction form
    1,231,917.85/1,699,936.02 = 687,978.16/x
  3. Step 3: Cross multiply
    1,231,917.85x = 1,699,936.02 × 687,978.16
  4. Step 4: Simplify right side
    1,231,917.85x = 1,169,518,855,157.32
  5. Step 5: Solve for x
    x = 1,169,518,855,157.32/1,231,917.85
  6. Step 6: Final answer
    x = 949,348.09

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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.