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Finding the Fourth Proportional to 308,406.58, 425,581.36 and 172,451.72

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Solution

The fourth proportional to 308,406.58, 425,581.36 and 172,451.72 is: 237,972.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,406.58 : 425,581.36 = 172,451.72 : x
  2. Step 2: Convert to fraction form
    308,406.58/425,581.36 = 172,451.72/x
  3. Step 3: Cross multiply
    308,406.58x = 425,581.36 × 172,451.72
  4. Step 4: Simplify right side
    308,406.58x = 73,392,238,164.76
  5. Step 5: Solve for x
    x = 73,392,238,164.76/308,406.58
  6. Step 6: Final answer
    x = 237,972.35

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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.