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Finding the Fourth Proportional to 520,158.87, 780,265.31 and 165,200.67

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Solution

The fourth proportional to 520,158.87, 780,265.31 and 165,200.67 is: 247,809.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,158.87 : 780,265.31 = 165,200.67 : x
  2. Step 2: Convert to fraction form
    520,158.87/780,265.31 = 165,200.67/x
  3. Step 3: Cross multiply
    520,158.87x = 780,265.31 × 165,200.67
  4. Step 4: Simplify right side
    520,158.87x = 128,900,351,163.75
  5. Step 5: Solve for x
    x = 128,900,351,163.75/520,158.87
  6. Step 6: Final answer
    x = 247,809.58

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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.