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Finding the Fourth Proportional to 664,975.80, 996,815.70 and 380,374.20

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Solution

The fourth proportional to 664,975.80, 996,815.70 and 380,374.20 is: 570,190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,975.80 : 996,815.70 = 380,374.20 : x
  2. Step 2: Convert to fraction form
    664,975.80/996,815.70 = 380,374.20/x
  3. Step 3: Cross multiply
    664,975.80x = 996,815.70 × 380,374.20
  4. Step 4: Simplify right side
    664,975.80x = 379,162,974,434.94
  5. Step 5: Solve for x
    x = 379,162,974,434.94/664,975.80
  6. Step 6: Final answer
    x = 570,190.64

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Double scale
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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.