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Finding the Fourth Proportional to 509,620.40, 764,430.60 and 130,540.40

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Solution

The fourth proportional to 509,620.40, 764,430.60 and 130,540.40 is: 195,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,620.40 : 764,430.60 = 130,540.40 : x
  2. Step 2: Convert to fraction form
    509,620.40/764,430.60 = 130,540.40/x
  3. Step 3: Cross multiply
    509,620.40x = 764,430.60 × 130,540.40
  4. Step 4: Simplify right side
    509,620.40x = 99,789,076,296.24
  5. Step 5: Solve for x
    x = 99,789,076,296.24/509,620.40
  6. Step 6: Final answer
    x = 195,810.60

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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.