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Finding the Fourth Proportional to 308,649.56, 425,952.95 and 172,675.40

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Solution

The fourth proportional to 308,649.56, 425,952.95 and 172,675.40 is: 238,301.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,649.56 : 425,952.95 = 172,675.40 : x
  2. Step 2: Convert to fraction form
    308,649.56/425,952.95 = 172,675.40/x
  3. Step 3: Cross multiply
    308,649.56x = 425,952.95 × 172,675.40
  4. Step 4: Simplify right side
    308,649.56x = 73,551,593,029.29
  5. Step 5: Solve for x
    x = 73,551,593,029.29/308,649.56
  6. Step 6: Final answer
    x = 238,301.31

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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.