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Finding the Fourth Proportional to 308,015.56, 425,019.45 and 172,032.15

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Solution

The fourth proportional to 308,015.56, 425,019.45 and 172,032.15 is: 237,380.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,015.56 : 425,019.45 = 172,032.15 : x
  2. Step 2: Convert to fraction form
    308,015.56/425,019.45 = 172,032.15/x
  3. Step 3: Cross multiply
    308,015.56x = 425,019.45 × 172,032.15
  4. Step 4: Simplify right side
    308,015.56x = 73,117,012,014.26
  5. Step 5: Solve for x
    x = 73,117,012,014.26/308,015.56
  6. Step 6: Final answer
    x = 237,380.90

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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.