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Finding the Fourth Proportional to 289,159.95, 398,760.79 and 225,474.51

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Solution

The fourth proportional to 289,159.95, 398,760.79 and 225,474.51 is: 310,936.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,159.95 : 398,760.79 = 225,474.51 : x
  2. Step 2: Convert to fraction form
    289,159.95/398,760.79 = 225,474.51/x
  3. Step 3: Cross multiply
    289,159.95x = 398,760.79 × 225,474.51
  4. Step 4: Simplify right side
    289,159.95x = 89,910,393,732.46
  5. Step 5: Solve for x
    x = 89,910,393,732.46/289,159.95
  6. Step 6: Final answer
    x = 310,936.54

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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.