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Finding the Fourth Proportional to 308,129.60, 425,175.84 and 172,157.76

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Solution

The fourth proportional to 308,129.60, 425,175.84 and 172,157.76 is: 237,553.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,129.60 : 425,175.84 = 172,157.76 : x
  2. Step 2: Convert to fraction form
    308,129.60/425,175.84 = 172,157.76/x
  3. Step 3: Cross multiply
    308,129.60x = 425,175.84 × 172,157.76
  4. Step 4: Simplify right side
    308,129.60x = 73,197,320,220.52
  5. Step 5: Solve for x
    x = 73,197,320,220.52/308,129.60
  6. Step 6: Final answer
    x = 237,553.68

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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.