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Finding the Fourth Proportional to 329,126, 493,690.62 and 79,808

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Solution

The fourth proportional to 329,126, 493,690.62 and 79,808 is: 119,712.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,126 : 493,690.62 = 79,808 : x
  2. Step 2: Convert to fraction form
    329,126/493,690.62 = 79,808/x
  3. Step 3: Cross multiply
    329,126x = 493,690.62 × 79,808
  4. Step 4: Simplify right side
    329,126x = 39,400,461,000.96
  5. Step 5: Solve for x
    x = 39,400,461,000.96/329,126
  6. Step 6: Final answer
    x = 119,712.39

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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.