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Finding the Fourth Proportional to 290,405.01, 435,629.39 and 80,041.13

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Solution

The fourth proportional to 290,405.01, 435,629.39 and 80,041.13 is: 120,067.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,405.01 : 435,629.39 = 80,041.13 : x
  2. Step 2: Convert to fraction form
    290,405.01/435,629.39 = 80,041.13/x
  3. Step 3: Cross multiply
    290,405.01x = 435,629.39 × 80,041.13
  4. Step 4: Simplify right side
    290,405.01x = 34,868,266,058.46
  5. Step 5: Solve for x
    x = 34,868,266,058.46/290,405.01
  6. Step 6: Final answer
    x = 120,067.72

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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.