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Finding the Fourth Proportional to 328,644.52, 492,966.78 and 79,326.52

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Solution

The fourth proportional to 328,644.52, 492,966.78 and 79,326.52 is: 118,989.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,644.52 : 492,966.78 = 79,326.52 : x
  2. Step 2: Convert to fraction form
    328,644.52/492,966.78 = 79,326.52/x
  3. Step 3: Cross multiply
    328,644.52x = 492,966.78 × 79,326.52
  4. Step 4: Simplify right side
    328,644.52x = 39,105,339,133.01
  5. Step 5: Solve for x
    x = 39,105,339,133.01/328,644.52
  6. Step 6: Final answer
    x = 118,989.78

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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.