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Finding the Fourth Proportional to 808,720.80, 1,214,079.60 and 509,200.80

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Solution

The fourth proportional to 808,720.80, 1,214,079.60 and 509,200.80 is: 764,429.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,720.80 : 1,214,079.60 = 509,200.80 : x
  2. Step 2: Convert to fraction form
    808,720.80/1,214,079.60 = 509,200.80/x
  3. Step 3: Cross multiply
    808,720.80x = 1,214,079.60 × 509,200.80
  4. Step 4: Simplify right side
    808,720.80x = 618,210,303,583.68
  5. Step 5: Solve for x
    x = 618,210,303,583.68/808,720.80
  6. Step 6: Final answer
    x = 764,429.83

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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.