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Finding the Fourth Proportional to 509,982.80, 764,974.20 and 307,029.20

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Solution

The fourth proportional to 509,982.80, 764,974.20 and 307,029.20 is: 460,543.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,982.80 : 764,974.20 = 307,029.20 : x
  2. Step 2: Convert to fraction form
    509,982.80/764,974.20 = 307,029.20/x
  3. Step 3: Cross multiply
    509,982.80x = 764,974.20 × 307,029.20
  4. Step 4: Simplify right side
    509,982.80x = 234,869,416,646.64
  5. Step 5: Solve for x
    x = 234,869,416,646.64/509,982.80
  6. Step 6: Final answer
    x = 460,543.80

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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.