Home / 1,315,212.40-1,969,319.40-839,321.20

Finding the Fourth Proportional to 1,315,212.40, 1,969,319.40 and 839,321.20

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Solution

The fourth proportional to 1,315,212.40, 1,969,319.40 and 839,321.20 is: 1,256,748.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,212.40 : 1,969,319.40 = 839,321.20 : x
  2. Step 2: Convert to fraction form
    1,315,212.40/1,969,319.40 = 839,321.20/x
  3. Step 3: Cross multiply
    1,315,212.40x = 1,969,319.40 × 839,321.20
  4. Step 4: Simplify right side
    1,315,212.40x = 1,652,891,521,991.28
  5. Step 5: Solve for x
    x = 1,652,891,521,991.28/1,315,212.40
  6. Step 6: Final answer
    x = 1,256,748.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.