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Finding the Fourth Proportional to 316,998.91, 436,723.27 and 221,354.11

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Solution

The fourth proportional to 316,998.91, 436,723.27 and 221,354.11 is: 304,955.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,998.91 : 436,723.27 = 221,354.11 : x
  2. Step 2: Convert to fraction form
    316,998.91/436,723.27 = 221,354.11/x
  3. Step 3: Cross multiply
    316,998.91x = 436,723.27 × 221,354.11
  4. Step 4: Simplify right side
    316,998.91x = 96,670,490,747.14
  5. Step 5: Solve for x
    x = 96,670,490,747.14/316,998.91
  6. Step 6: Final answer
    x = 304,955.28

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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.