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Finding the Fourth Proportional to 312,861.32, 469,431.50 and 144,291

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Solution

The fourth proportional to 312,861.32, 469,431.50 and 144,291 is: 216,500.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,861.32 : 469,431.50 = 144,291 : x
  2. Step 2: Convert to fraction form
    312,861.32/469,431.50 = 144,291/x
  3. Step 3: Cross multiply
    312,861.32x = 469,431.50 × 144,291
  4. Step 4: Simplify right side
    312,861.32x = 67,734,739,845.05
  5. Step 5: Solve for x
    x = 67,734,739,845.05/312,861.32
  6. Step 6: Final answer
    x = 216,500.85

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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.