Home / 813,500.72-1,219,390.73-300,836.43

Finding the Fourth Proportional to 813,500.72, 1,219,390.73 and 300,836.43

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Solution

The fourth proportional to 813,500.72, 1,219,390.73 and 300,836.43 is: 450,936.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,500.72 : 1,219,390.73 = 300,836.43 : x
  2. Step 2: Convert to fraction form
    813,500.72/1,219,390.73 = 300,836.43/x
  3. Step 3: Cross multiply
    813,500.72x = 1,219,390.73 × 300,836.43
  4. Step 4: Simplify right side
    813,500.72x = 366,837,153,988.29
  5. Step 5: Solve for x
    x = 366,837,153,988.29/813,500.72
  6. Step 6: Final answer
    x = 450,936.48

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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.