Home / 1,291,717.80-1,936,701.90-660,112.20

Finding the Fourth Proportional to 1,291,717.80, 1,936,701.90 and 660,112.20

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Solution

The fourth proportional to 1,291,717.80, 1,936,701.90 and 660,112.20 is: 989,721.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,717.80 : 1,936,701.90 = 660,112.20 : x
  2. Step 2: Convert to fraction form
    1,291,717.80/1,936,701.90 = 660,112.20/x
  3. Step 3: Cross multiply
    1,291,717.80x = 1,936,701.90 × 660,112.20
  4. Step 4: Simplify right side
    1,291,717.80x = 1,278,440,551,953.18
  5. Step 5: Solve for x
    x = 1,278,440,551,953.18/1,291,717.80
  6. Step 6: Final answer
    x = 989,721.25

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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.