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Finding the Fourth Proportional to 403,508.19, 605,087.19 and 137,197.20

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Solution

The fourth proportional to 403,508.19, 605,087.19 and 137,197.20 is: 205,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,508.19 : 605,087.19 = 137,197.20 : x
  2. Step 2: Convert to fraction form
    403,508.19/605,087.19 = 137,197.20/x
  3. Step 3: Cross multiply
    403,508.19x = 605,087.19 × 137,197.20
  4. Step 4: Simplify right side
    403,508.19x = 83,016,268,223.87
  5. Step 5: Solve for x
    x = 83,016,268,223.87/403,508.19
  6. Step 6: Final answer
    x = 205,736.27

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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.