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Finding the Fourth Proportional to 336,992.51, 505,646.26 and 147,428.31

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Solution

The fourth proportional to 336,992.51, 505,646.26 and 147,428.31 is: 221,211.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    336,992.51 : 505,646.26 = 147,428.31 : x
  2. Step 2: Convert to fraction form
    336,992.51/505,646.26 = 147,428.31/x
  3. Step 3: Cross multiply
    336,992.51x = 505,646.26 × 147,428.31
  4. Step 4: Simplify right side
    336,992.51x = 74,546,573,201.05
  5. Step 5: Solve for x
    x = 74,546,573,201.05/336,992.51
  6. Step 6: Final answer
    x = 221,211.36

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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.