Home / 809,201.80-1,213,656.90-509,145.40

Finding the Fourth Proportional to 809,201.80, 1,213,656.90 and 509,145.40

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Solution

The fourth proportional to 809,201.80, 1,213,656.90 and 509,145.40 is: 763,626.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,201.80 : 1,213,656.90 = 509,145.40 : x
  2. Step 2: Convert to fraction form
    809,201.80/1,213,656.90 = 509,145.40/x
  3. Step 3: Cross multiply
    809,201.80x = 1,213,656.90 × 509,145.40
  4. Step 4: Simplify right side
    809,201.80x = 617,927,827,813.26
  5. Step 5: Solve for x
    x = 617,927,827,813.26/809,201.80
  6. Step 6: Final answer
    x = 763,626.36

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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.