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Finding the Fourth Proportional to 306,392.22, 422,821.25 and 172,256.22

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Solution

The fourth proportional to 306,392.22, 422,821.25 and 172,256.22 is: 237,713.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,392.22 : 422,821.25 = 172,256.22 : x
  2. Step 2: Convert to fraction form
    306,392.22/422,821.25 = 172,256.22/x
  3. Step 3: Cross multiply
    306,392.22x = 422,821.25 × 172,256.22
  4. Step 4: Simplify right side
    306,392.22x = 72,833,590,045.35
  5. Step 5: Solve for x
    x = 72,833,590,045.35/306,392.22
  6. Step 6: Final answer
    x = 237,713.58

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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.