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Finding the Fourth Proportional to 1,131,922.56, 1,695,744.72 and 668,919.20

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Solution

The fourth proportional to 1,131,922.56, 1,695,744.72 and 668,919.20 is: 1,002,114.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131,922.56 : 1,695,744.72 = 668,919.20 : x
  2. Step 2: Convert to fraction form
    1,131,922.56/1,695,744.72 = 668,919.20/x
  3. Step 3: Cross multiply
    1,131,922.56x = 1,695,744.72 × 668,919.20
  4. Step 4: Simplify right side
    1,131,922.56x = 1,134,316,201,506.62
  5. Step 5: Solve for x
    x = 1,134,316,201,506.62/1,131,922.56
  6. Step 6: Final answer
    x = 1,002,114.67

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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.