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Finding the Fourth Proportional to 485,238.08, 728,082.57 and 185,619.62

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Solution

The fourth proportional to 485,238.08, 728,082.57 and 185,619.62 is: 278,515.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,238.08 : 728,082.57 = 185,619.62 : x
  2. Step 2: Convert to fraction form
    485,238.08/728,082.57 = 185,619.62/x
  3. Step 3: Cross multiply
    485,238.08x = 728,082.57 × 185,619.62
  4. Step 4: Simplify right side
    485,238.08x = 135,146,409,972.02
  5. Step 5: Solve for x
    x = 135,146,409,972.02/485,238.08
  6. Step 6: Final answer
    x = 278,515.67

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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.