Home / 317,834.48-438,609.57-172,638.78

Finding the Fourth Proportional to 317,834.48, 438,609.57 and 172,638.78

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Solution

The fourth proportional to 317,834.48, 438,609.57 and 172,638.78 is: 238,240.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,834.48 : 438,609.57 = 172,638.78 : x
  2. Step 2: Convert to fraction form
    317,834.48/438,609.57 = 172,638.78/x
  3. Step 3: Cross multiply
    317,834.48x = 438,609.57 × 172,638.78
  4. Step 4: Simplify right side
    317,834.48x = 75,721,018,768.94
  5. Step 5: Solve for x
    x = 75,721,018,768.94/317,834.48
  6. Step 6: Final answer
    x = 238,240.41

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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.