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Finding the Fourth Proportional to 308,176.82, 425,275.87 and 172,211.89

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Solution

The fourth proportional to 308,176.82, 425,275.87 and 172,211.89 is: 237,647.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,176.82 : 425,275.87 = 172,211.89 : x
  2. Step 2: Convert to fraction form
    308,176.82/425,275.87 = 172,211.89/x
  3. Step 3: Cross multiply
    308,176.82x = 425,275.87 × 172,211.89
  4. Step 4: Simplify right side
    308,176.82x = 73,237,560,970.66
  5. Step 5: Solve for x
    x = 73,237,560,970.66/308,176.82
  6. Step 6: Final answer
    x = 237,647.86

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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.