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Finding the Fourth Proportional to 329,125, 493,689.12 and 79,807

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Solution

The fourth proportional to 329,125, 493,689.12 and 79,807 is: 119,710.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,125 : 493,689.12 = 79,807 : x
  2. Step 2: Convert to fraction form
    329,125/493,689.12 = 79,807/x
  3. Step 3: Cross multiply
    329,125x = 493,689.12 × 79,807
  4. Step 4: Simplify right side
    329,125x = 39,399,847,599.84
  5. Step 5: Solve for x
    x = 39,399,847,599.84/329,125
  6. Step 6: Final answer
    x = 119,710.89

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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.