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Finding the Fourth Proportional to 308,345.68, 425,484.39 and 172,365.31

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Solution

The fourth proportional to 308,345.68, 425,484.39 and 172,365.31 is: 237,845.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,345.68 : 425,484.39 = 172,365.31 : x
  2. Step 2: Convert to fraction form
    308,345.68/425,484.39 = 172,365.31/x
  3. Step 3: Cross multiply
    308,345.68x = 425,484.39 × 172,365.31
  4. Step 4: Simplify right side
    308,345.68x = 73,338,748,782.51
  5. Step 5: Solve for x
    x = 73,338,748,782.51/308,345.68
  6. Step 6: Final answer
    x = 237,845.88

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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.