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Finding the Fourth Proportional to 316,201.94, 436,349.40 and 172,958.90

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Solution

The fourth proportional to 316,201.94, 436,349.40 and 172,958.90 is: 238,678.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,201.94 : 436,349.40 = 172,958.90 : x
  2. Step 2: Convert to fraction form
    316,201.94/436,349.40 = 172,958.90/x
  3. Step 3: Cross multiply
    316,201.94x = 436,349.40 × 172,958.90
  4. Step 4: Simplify right side
    316,201.94x = 75,470,512,239.66
  5. Step 5: Solve for x
    x = 75,470,512,239.66/316,201.94
  6. Step 6: Final answer
    x = 238,678.21

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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.