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Finding the Fourth Proportional to 317,703.89, 438,060.94 and 236,991.31

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Solution

The fourth proportional to 317,703.89, 438,060.94 and 236,991.31 is: 326,771.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,703.89 : 438,060.94 = 236,991.31 : x
  2. Step 2: Convert to fraction form
    317,703.89/438,060.94 = 236,991.31/x
  3. Step 3: Cross multiply
    317,703.89x = 438,060.94 × 236,991.31
  4. Step 4: Simplify right side
    317,703.89x = 103,816,636,030.43
  5. Step 5: Solve for x
    x = 103,816,636,030.43/317,703.89
  6. Step 6: Final answer
    x = 326,771.69

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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.