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Finding the Fourth Proportional to 308,187.16, 425,171.64 and 187,308.97

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Solution

The fourth proportional to 308,187.16, 425,171.64 and 187,308.97 is: 258,409.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,187.16 : 425,171.64 = 187,308.97 : x
  2. Step 2: Convert to fraction form
    308,187.16/425,171.64 = 187,308.97/x
  3. Step 3: Cross multiply
    308,187.16x = 425,171.64 × 187,308.97
  4. Step 4: Simplify right side
    308,187.16x = 79,638,461,961.61
  5. Step 5: Solve for x
    x = 79,638,461,961.61/308,187.16
  6. Step 6: Final answer
    x = 258,409.41

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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.