Home / 1,399,786.52-1,931,705.86-819,121.28

Finding the Fourth Proportional to 1,399,786.52, 1,931,705.86 and 819,121.28

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Solution

The fourth proportional to 1,399,786.52, 1,931,705.86 and 819,121.28 is: 1,130,387.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,786.52 : 1,931,705.86 = 819,121.28 : x
  2. Step 2: Convert to fraction form
    1,399,786.52/1,931,705.86 = 819,121.28/x
  3. Step 3: Cross multiply
    1,399,786.52x = 1,931,705.86 × 819,121.28
  4. Step 4: Simplify right side
    1,399,786.52x = 1,582,301,376,626.70
  5. Step 5: Solve for x
    x = 1,582,301,376,626.70/1,399,786.52
  6. Step 6: Final answer
    x = 1,130,387.64

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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.