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Finding the Fourth Proportional to 306,339.18, 422,744.31 and 172,203.18

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Solution

The fourth proportional to 306,339.18, 422,744.31 and 172,203.18 is: 237,638.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,339.18 : 422,744.31 = 172,203.18 : x
  2. Step 2: Convert to fraction form
    306,339.18/422,744.31 = 172,203.18/x
  3. Step 3: Cross multiply
    306,339.18x = 422,744.31 × 172,203.18
  4. Step 4: Simplify right side
    306,339.18x = 72,797,914,508.91
  5. Step 5: Solve for x
    x = 72,797,914,508.91/306,339.18
  6. Step 6: Final answer
    x = 237,638.28

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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.