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Finding the Fourth Proportional to 489,713.54, 734,576.79 and 279,100.58

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Solution

The fourth proportional to 489,713.54, 734,576.79 and 279,100.58 is: 418,654.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,713.54 : 734,576.79 = 279,100.58 : x
  2. Step 2: Convert to fraction form
    489,713.54/734,576.79 = 279,100.58/x
  3. Step 3: Cross multiply
    489,713.54x = 734,576.79 × 279,100.58
  4. Step 4: Simplify right side
    489,713.54x = 205,020,808,143.54
  5. Step 5: Solve for x
    x = 205,020,808,143.54/489,713.54
  6. Step 6: Final answer
    x = 418,654.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.