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Finding the Fourth Proportional to 509,430.40, 764,145.60 and 329,804.80

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Solution

The fourth proportional to 509,430.40, 764,145.60 and 329,804.80 is: 494,707.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,430.40 : 764,145.60 = 329,804.80 : x
  2. Step 2: Convert to fraction form
    509,430.40/764,145.60 = 329,804.80/x
  3. Step 3: Cross multiply
    509,430.40x = 764,145.60 × 329,804.80
  4. Step 4: Simplify right side
    509,430.40x = 252,018,886,778.88
  5. Step 5: Solve for x
    x = 252,018,886,778.88/509,430.40
  6. Step 6: Final answer
    x = 494,707.20

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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.