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Finding the Fourth Proportional to 289,722.30, 434,583.45 and 79,359.90

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Solution

The fourth proportional to 289,722.30, 434,583.45 and 79,359.90 is: 119,039.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,722.30 : 434,583.45 = 79,359.90 : x
  2. Step 2: Convert to fraction form
    289,722.30/434,583.45 = 79,359.90/x
  3. Step 3: Cross multiply
    289,722.30x = 434,583.45 × 79,359.90
  4. Step 4: Simplify right side
    289,722.30x = 34,488,499,133.66
  5. Step 5: Solve for x
    x = 34,488,499,133.66/289,722.30
  6. Step 6: Final answer
    x = 119,039.85

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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.