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Finding the Fourth Proportional to 317,706.09, 438,435.62 and 172,512.10

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Solution

The fourth proportional to 317,706.09, 438,435.62 and 172,512.10 is: 238,067.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,706.09 : 438,435.62 = 172,512.10 : x
  2. Step 2: Convert to fraction form
    317,706.09/438,435.62 = 172,512.10/x
  3. Step 3: Cross multiply
    317,706.09x = 438,435.62 × 172,512.10
  4. Step 4: Simplify right side
    317,706.09x = 75,635,449,521.00
  5. Step 5: Solve for x
    x = 75,635,449,521.00/317,706.09
  6. Step 6: Final answer
    x = 238,067.36

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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.