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Finding the Fourth Proportional to 1,978,349.22, 2,965,973.58 and 781,167.65

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Solution

The fourth proportional to 1,978,349.22, 2,965,973.58 and 781,167.65 is: 1,171,139.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,349.22 : 2,965,973.58 = 781,167.65 : x
  2. Step 2: Convert to fraction form
    1,978,349.22/2,965,973.58 = 781,167.65/x
  3. Step 3: Cross multiply
    1,978,349.22x = 2,965,973.58 × 781,167.65
  4. Step 4: Simplify right side
    1,978,349.22x = 2,316,922,607,743.22
  5. Step 5: Solve for x
    x = 2,316,922,607,743.22/1,978,349.22
  6. Step 6: Final answer
    x = 1,171,139.34

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.