Home / 1,396,990.72-1,928,079.12-824,171.68

Finding the Fourth Proportional to 1,396,990.72, 1,928,079.12 and 824,171.68

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Solution

The fourth proportional to 1,396,990.72, 1,928,079.12 and 824,171.68 is: 1,137,493.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,396,990.72 : 1,928,079.12 = 824,171.68 : x
  2. Step 2: Convert to fraction form
    1,396,990.72/1,928,079.12 = 824,171.68/x
  3. Step 3: Cross multiply
    1,396,990.72x = 1,928,079.12 × 824,171.68
  4. Step 4: Simplify right side
    1,396,990.72x = 1,589,068,207,503.32
  5. Step 5: Solve for x
    x = 1,589,068,207,503.32/1,396,990.72
  6. Step 6: Final answer
    x = 1,137,493.75

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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.