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Finding the Fourth Proportional to 308,178.32, 425,277.94 and 172,213.39

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Solution

The fourth proportional to 308,178.32, 425,277.94 and 172,213.39 is: 237,649.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,178.32 : 425,277.94 = 172,213.39 : x
  2. Step 2: Convert to fraction form
    308,178.32/425,277.94 = 172,213.39/x
  3. Step 3: Cross multiply
    308,178.32x = 425,277.94 × 172,213.39
  4. Step 4: Simplify right side
    308,178.32x = 73,238,555,739.62
  5. Step 5: Solve for x
    x = 73,238,555,739.62/308,178.32
  6. Step 6: Final answer
    x = 237,649.93

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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.