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Finding the Fourth Proportional to 809,396.80, 1,134,814.40 and 809,396.80

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Solution

The fourth proportional to 809,396.80, 1,134,814.40 and 809,396.80 is: 1,134,814.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,396.80 : 1,134,814.40 = 809,396.80 : x
  2. Step 2: Convert to fraction form
    809,396.80/1,134,814.40 = 809,396.80/x
  3. Step 3: Cross multiply
    809,396.80x = 1,134,814.40 × 809,396.80
  4. Step 4: Simplify right side
    809,396.80x = 918,515,143,953.92
  5. Step 5: Solve for x
    x = 918,515,143,953.92/809,396.80
  6. Step 6: Final answer
    x = 1,134,814.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.