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Finding the Fourth Proportional to 509,552.20, 764,328.30 and 209,933.20

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Solution

The fourth proportional to 509,552.20, 764,328.30 and 209,933.20 is: 314,899.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,552.20 : 764,328.30 = 209,933.20 : x
  2. Step 2: Convert to fraction form
    509,552.20/764,328.30 = 209,933.20/x
  3. Step 3: Cross multiply
    509,552.20x = 764,328.30 × 209,933.20
  4. Step 4: Simplify right side
    509,552.20x = 160,457,885,869.56
  5. Step 5: Solve for x
    x = 160,457,885,869.56/509,552.20
  6. Step 6: Final answer
    x = 314,899.80

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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.