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Finding the Fourth Proportional to 290,781.47, 401,149.79 and 193,891.90

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Solution

The fourth proportional to 290,781.47, 401,149.79 and 193,891.90 is: 267,485.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,781.47 : 401,149.79 = 193,891.90 : x
  2. Step 2: Convert to fraction form
    290,781.47/401,149.79 = 193,891.90/x
  3. Step 3: Cross multiply
    290,781.47x = 401,149.79 × 193,891.90
  4. Step 4: Simplify right side
    290,781.47x = 77,779,696,148.17
  5. Step 5: Solve for x
    x = 77,779,696,148.17/290,781.47
  6. Step 6: Final answer
    x = 267,485.05

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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.