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Finding the Fourth Proportional to 308,472.67, 425,689.32 and 172,505.08

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Solution

The fourth proportional to 308,472.67, 425,689.32 and 172,505.08 is: 238,055.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,472.67 : 425,689.32 = 172,505.08 : x
  2. Step 2: Convert to fraction form
    308,472.67/425,689.32 = 172,505.08/x
  3. Step 3: Cross multiply
    308,472.67x = 425,689.32 × 172,505.08
  4. Step 4: Simplify right side
    308,472.67x = 73,433,570,201.75
  5. Step 5: Solve for x
    x = 73,433,570,201.75/308,472.67
  6. Step 6: Final answer
    x = 238,055.35

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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.