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Finding the Fourth Proportional to 289,679.40, 434,562.30 and 102,676.20

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Solution

The fourth proportional to 289,679.40, 434,562.30 and 102,676.20 is: 154,029.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,679.40 : 434,562.30 = 102,676.20 : x
  2. Step 2: Convert to fraction form
    289,679.40/434,562.30 = 102,676.20/x
  3. Step 3: Cross multiply
    289,679.40x = 434,562.30 × 102,676.20
  4. Step 4: Simplify right side
    289,679.40x = 44,619,205,627.26
  5. Step 5: Solve for x
    x = 44,619,205,627.26/289,679.40
  6. Step 6: Final answer
    x = 154,029.61

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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.