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Finding the Fourth Proportional to 509,946.70, 764,920.05 and 210,327.70

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Solution

The fourth proportional to 509,946.70, 764,920.05 and 210,327.70 is: 315,491.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,946.70 : 764,920.05 = 210,327.70 : x
  2. Step 2: Convert to fraction form
    509,946.70/764,920.05 = 210,327.70/x
  3. Step 3: Cross multiply
    509,946.70x = 764,920.05 × 210,327.70
  4. Step 4: Simplify right side
    509,946.70x = 160,883,874,800.39
  5. Step 5: Solve for x
    x = 160,883,874,800.39/509,946.70
  6. Step 6: Final answer
    x = 315,491.55

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Double scale
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Similar ratio
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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.