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Finding the Fourth Proportional to 509,993.80, 764,990.70 and 177,569.80

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Solution

The fourth proportional to 509,993.80, 764,990.70 and 177,569.80 is: 266,354.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,993.80 : 764,990.70 = 177,569.80 : x
  2. Step 2: Convert to fraction form
    509,993.80/764,990.70 = 177,569.80/x
  3. Step 3: Cross multiply
    509,993.80x = 764,990.70 × 177,569.80
  4. Step 4: Simplify right side
    509,993.80x = 135,839,245,600.86
  5. Step 5: Solve for x
    x = 135,839,245,600.86/509,993.80
  6. Step 6: Final answer
    x = 266,354.70

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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.