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Finding the Fourth Proportional to 308,569.82, 425,806.31 and 172,580.22

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Solution

The fourth proportional to 308,569.82, 425,806.31 and 172,580.22 is: 238,149.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,569.82 : 425,806.31 = 172,580.22 : x
  2. Step 2: Convert to fraction form
    308,569.82/425,806.31 = 172,580.22/x
  3. Step 3: Cross multiply
    308,569.82x = 425,806.31 × 172,580.22
  4. Step 4: Simplify right side
    308,569.82x = 73,485,746,657.19
  5. Step 5: Solve for x
    x = 73,485,746,657.19/308,569.82
  6. Step 6: Final answer
    x = 238,149.49

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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.