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Finding the Fourth Proportional to 308,481.95, 425,726.79 and 172,528.55

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Solution

The fourth proportional to 308,481.95, 425,726.79 and 172,528.55 is: 238,101.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,481.95 : 425,726.79 = 172,528.55 : x
  2. Step 2: Convert to fraction form
    308,481.95/425,726.79 = 172,528.55/x
  3. Step 3: Cross multiply
    308,481.95x = 425,726.79 × 172,528.55
  4. Step 4: Simplify right side
    308,481.95x = 73,450,024,595.71
  5. Step 5: Solve for x
    x = 73,450,024,595.71/308,481.95
  6. Step 6: Final answer
    x = 238,101.53

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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.