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Finding the Fourth Proportional to 313,188.60, 469,780.64 and 76,529.10

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Solution

The fourth proportional to 313,188.60, 469,780.64 and 76,529.10 is: 114,793.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,188.60 : 469,780.64 = 76,529.10 : x
  2. Step 2: Convert to fraction form
    313,188.60/469,780.64 = 76,529.10/x
  3. Step 3: Cross multiply
    313,188.60x = 469,780.64 × 76,529.10
  4. Step 4: Simplify right side
    313,188.60x = 35,951,889,576.62
  5. Step 5: Solve for x
    x = 35,951,889,576.62/313,188.60
  6. Step 6: Final answer
    x = 114,793.10

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1.5x scale

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.