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Finding the Fourth Proportional to 308,656.35, 425,921.47 and 172,679.63

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Solution

The fourth proportional to 308,656.35, 425,921.47 and 172,679.63 is: 238,284.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,656.35 : 425,921.47 = 172,679.63 : x
  2. Step 2: Convert to fraction form
    308,656.35/425,921.47 = 172,679.63/x
  3. Step 3: Cross multiply
    308,656.35x = 425,921.47 × 172,679.63
  4. Step 4: Simplify right side
    308,656.35x = 73,547,959,287.35
  5. Step 5: Solve for x
    x = 73,547,959,287.35/308,656.35
  6. Step 6: Final answer
    x = 238,284.29

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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.