Home / 990,401.20-1,485,601.90-516,975.84

Finding the Fourth Proportional to 990,401.20, 1,485,601.90 and 516,975.84

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Solution

The fourth proportional to 990,401.20, 1,485,601.90 and 516,975.84 is: 775,463.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,401.20 : 1,485,601.90 = 516,975.84 : x
  2. Step 2: Convert to fraction form
    990,401.20/1,485,601.90 = 516,975.84/x
  3. Step 3: Cross multiply
    990,401.20x = 1,485,601.90 × 516,975.84
  4. Step 4: Simplify right side
    990,401.20x = 768,020,288,865.66
  5. Step 5: Solve for x
    x = 768,020,288,865.66/990,401.20
  6. Step 6: Final answer
    x = 775,463.81

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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.