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Finding the Fourth Proportional to 308,661.48, 425,973.96 and 172,708.32

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Solution

The fourth proportional to 308,661.48, 425,973.96 and 172,708.32 is: 238,349.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,661.48 : 425,973.96 = 172,708.32 : x
  2. Step 2: Convert to fraction form
    308,661.48/425,973.96 = 172,708.32/x
  3. Step 3: Cross multiply
    308,661.48x = 425,973.96 × 172,708.32
  4. Step 4: Simplify right side
    308,661.48x = 73,569,246,995.35
  5. Step 5: Solve for x
    x = 73,569,246,995.35/308,661.48
  6. Step 6: Final answer
    x = 238,349.30

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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.