Home / 1,213,972.80-1,820,959.20-765,200.40

Finding the Fourth Proportional to 1,213,972.80, 1,820,959.20 and 765,200.40

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Solution

The fourth proportional to 1,213,972.80, 1,820,959.20 and 765,200.40 is: 1,147,800.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,972.80 : 1,820,959.20 = 765,200.40 : x
  2. Step 2: Convert to fraction form
    1,213,972.80/1,820,959.20 = 765,200.40/x
  3. Step 3: Cross multiply
    1,213,972.80x = 1,820,959.20 × 765,200.40
  4. Step 4: Simplify right side
    1,213,972.80x = 1,393,398,708,223.68
  5. Step 5: Solve for x
    x = 1,393,398,708,223.68/1,213,972.80
  6. Step 6: Final answer
    x = 1,147,800.60

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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.