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Finding the Fourth Proportional to 308,421.96, 425,566.74 and 172,458.60

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Solution

The fourth proportional to 308,421.96, 425,566.74 and 172,458.60 is: 237,961.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,421.96 : 425,566.74 = 172,458.60 : x
  2. Step 2: Convert to fraction form
    308,421.96/425,566.74 = 172,458.60/x
  3. Step 3: Cross multiply
    308,421.96x = 425,566.74 × 172,458.60
  4. Step 4: Simplify right side
    308,421.96x = 73,392,644,186.96
  5. Step 5: Solve for x
    x = 73,392,644,186.96/308,421.96
  6. Step 6: Final answer
    x = 237,961.80

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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.