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Finding the Fourth Proportional to 308,305.56, 425,530.32 and 187,421.25

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Solution

The fourth proportional to 308,305.56, 425,530.32 and 187,421.25 is: 258,683.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,305.56 : 425,530.32 = 187,421.25 : x
  2. Step 2: Convert to fraction form
    308,305.56/425,530.32 = 187,421.25/x
  3. Step 3: Cross multiply
    308,305.56x = 425,530.32 × 187,421.25
  4. Step 4: Simplify right side
    308,305.56x = 79,753,424,487.30
  5. Step 5: Solve for x
    x = 79,753,424,487.30/308,305.56
  6. Step 6: Final answer
    x = 258,683.06

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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.