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Finding the Fourth Proportional to 306,397.15, 422,828.05 and 172,261.15

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Solution

The fourth proportional to 306,397.15, 422,828.05 and 172,261.15 is: 237,720.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,397.15 : 422,828.05 = 172,261.15 : x
  2. Step 2: Convert to fraction form
    306,397.15/422,828.05 = 172,261.15/x
  3. Step 3: Cross multiply
    306,397.15x = 422,828.05 × 172,261.15
  4. Step 4: Simplify right side
    306,397.15x = 72,836,846,145.26
  5. Step 5: Solve for x
    x = 72,836,846,145.26/306,397.15
  6. Step 6: Final answer
    x = 237,720.38

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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.