Home / 2,187,012.71-3,018,079.43-1,220,143.20

Finding the Fourth Proportional to 2,187,012.71, 3,018,079.43 and 1,220,143.20

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Solution

The fourth proportional to 2,187,012.71, 3,018,079.43 and 1,220,143.20 is: 1,683,798.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187,012.71 : 3,018,079.43 = 1,220,143.20 : x
  2. Step 2: Convert to fraction form
    2,187,012.71/3,018,079.43 = 1,220,143.20/x
  3. Step 3: Cross multiply
    2,187,012.71x = 3,018,079.43 × 1,220,143.20
  4. Step 4: Simplify right side
    2,187,012.71x = 3,682,489,087,473.66
  5. Step 5: Solve for x
    x = 3,682,489,087,473.66/2,187,012.71
  6. Step 6: Final answer
    x = 1,683,798.67

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1.5x scale

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.