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Finding the Fourth Proportional to 509,430.60, 764,145.90 and 454,318.20

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Solution

The fourth proportional to 509,430.60, 764,145.90 and 454,318.20 is: 681,477.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,430.60 : 764,145.90 = 454,318.20 : x
  2. Step 2: Convert to fraction form
    509,430.60/764,145.90 = 454,318.20/x
  3. Step 3: Cross multiply
    509,430.60x = 764,145.90 × 454,318.20
  4. Step 4: Simplify right side
    509,430.60x = 347,165,389,825.38
  5. Step 5: Solve for x
    x = 347,165,389,825.38/509,430.60
  6. Step 6: Final answer
    x = 681,477.30

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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.