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Finding the Fourth Proportional to 317,588.75, 438,272.88 and 172,394.43

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Solution

The fourth proportional to 317,588.75, 438,272.88 and 172,394.43 is: 237,904.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,588.75 : 438,272.88 = 172,394.43 : x
  2. Step 2: Convert to fraction form
    317,588.75/438,272.88 = 172,394.43/x
  3. Step 3: Cross multiply
    317,588.75x = 438,272.88 × 172,394.43
  4. Step 4: Simplify right side
    317,588.75x = 75,555,801,042.06
  5. Step 5: Solve for x
    x = 75,555,801,042.06/317,588.75
  6. Step 6: Final answer
    x = 237,904.53

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1.5x scale

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.