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Finding the Fourth Proportional to 764,608.60, 1,146,912.90 and 512,666.20

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Solution

The fourth proportional to 764,608.60, 1,146,912.90 and 512,666.20 is: 768,999.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,608.60 : 1,146,912.90 = 512,666.20 : x
  2. Step 2: Convert to fraction form
    764,608.60/1,146,912.90 = 512,666.20/x
  3. Step 3: Cross multiply
    764,608.60x = 1,146,912.90 × 512,666.20
  4. Step 4: Simplify right side
    764,608.60x = 587,983,478,173.98
  5. Step 5: Solve for x
    x = 587,983,478,173.98/764,608.60
  6. Step 6: Final answer
    x = 768,999.30

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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.