Home / 1,231,991.38-1,700,129.88-688,135.12

Finding the Fourth Proportional to 1,231,991.38, 1,700,129.88 and 688,135.12

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Solution

The fourth proportional to 1,231,991.38, 1,700,129.88 and 688,135.12 is: 949,616.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,991.38 : 1,700,129.88 = 688,135.12 : x
  2. Step 2: Convert to fraction form
    1,231,991.38/1,700,129.88 = 688,135.12/x
  3. Step 3: Cross multiply
    1,231,991.38x = 1,700,129.88 × 688,135.12
  4. Step 4: Simplify right side
    1,231,991.38x = 1,169,919,078,989.39
  5. Step 5: Solve for x
    x = 1,169,919,078,989.39/1,231,991.38
  6. Step 6: Final answer
    x = 949,616.29

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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.