Home / 1,288,309.40-1,932,464.10-809,307.80

Finding the Fourth Proportional to 1,288,309.40, 1,932,464.10 and 809,307.80

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Solution

The fourth proportional to 1,288,309.40, 1,932,464.10 and 809,307.80 is: 1,213,961.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,309.40 : 1,932,464.10 = 809,307.80 : x
  2. Step 2: Convert to fraction form
    1,288,309.40/1,932,464.10 = 809,307.80/x
  3. Step 3: Cross multiply
    1,288,309.40x = 1,932,464.10 × 809,307.80
  4. Step 4: Simplify right side
    1,288,309.40x = 1,563,958,269,349.98
  5. Step 5: Solve for x
    x = 1,563,958,269,349.98/1,288,309.40
  6. Step 6: Final answer
    x = 1,213,961.70

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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.