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Finding the Fourth Proportional to 1,978,066.50, 2,729,731.77 and 1,072,649.22

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Solution

The fourth proportional to 1,978,066.50, 2,729,731.77 and 1,072,649.22 is: 1,480,255.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,066.50 : 2,729,731.77 = 1,072,649.22 : x
  2. Step 2: Convert to fraction form
    1,978,066.50/2,729,731.77 = 1,072,649.22/x
  3. Step 3: Cross multiply
    1,978,066.50x = 2,729,731.77 × 1,072,649.22
  4. Step 4: Simplify right side
    1,978,066.50x = 2,928,044,653,899.72
  5. Step 5: Solve for x
    x = 2,928,044,653,899.72/1,978,066.50
  6. Step 6: Final answer
    x = 1,480,255.92

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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.