Home / 1,213,820.40-1,820,730.60-763,079.70

Finding the Fourth Proportional to 1,213,820.40, 1,820,730.60 and 763,079.70

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Solution

The fourth proportional to 1,213,820.40, 1,820,730.60 and 763,079.70 is: 1,144,619.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,820.40 : 1,820,730.60 = 763,079.70 : x
  2. Step 2: Convert to fraction form
    1,213,820.40/1,820,730.60 = 763,079.70/x
  3. Step 3: Cross multiply
    1,213,820.40x = 1,820,730.60 × 763,079.70
  4. Step 4: Simplify right side
    1,213,820.40x = 1,389,362,560,028.82
  5. Step 5: Solve for x
    x = 1,389,362,560,028.82/1,213,820.40
  6. Step 6: Final answer
    x = 1,144,619.55

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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.