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Finding the Fourth Proportional to 308,196.51, 425,311.76 and 172,230.45

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Solution

The fourth proportional to 308,196.51, 425,311.76 and 172,230.45 is: 237,678.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,196.51 : 425,311.76 = 172,230.45 : x
  2. Step 2: Convert to fraction form
    308,196.51/425,311.76 = 172,230.45/x
  3. Step 3: Cross multiply
    308,196.51x = 425,311.76 × 172,230.45
  4. Step 4: Simplify right side
    308,196.51x = 73,251,635,815.09
  5. Step 5: Solve for x
    x = 73,251,635,815.09/308,196.51
  6. Step 6: Final answer
    x = 237,678.34

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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.