Home / 1,231,990.25-1,700,128.49-688,133.90

Finding the Fourth Proportional to 1,231,990.25, 1,700,128.49 and 688,133.90

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Solution

The fourth proportional to 1,231,990.25, 1,700,128.49 and 688,133.90 is: 949,614.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231,990.25 : 1,700,128.49 = 688,133.90 : x
  2. Step 2: Convert to fraction form
    1,231,990.25/1,700,128.49 = 688,133.90/x
  3. Step 3: Cross multiply
    1,231,990.25x = 1,700,128.49 × 688,133.90
  4. Step 4: Simplify right side
    1,231,990.25x = 1,169,916,036,383.50
  5. Step 5: Solve for x
    x = 1,169,916,036,383.50/1,231,990.25
  6. Step 6: Final answer
    x = 949,614.69

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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.