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Finding the Fourth Proportional to 520,074.70, 780,112.05 and 436,093.90

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Solution

The fourth proportional to 520,074.70, 780,112.05 and 436,093.90 is: 654,140.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,074.70 : 780,112.05 = 436,093.90 : x
  2. Step 2: Convert to fraction form
    520,074.70/780,112.05 = 436,093.90/x
  3. Step 3: Cross multiply
    520,074.70x = 780,112.05 × 436,093.90
  4. Step 4: Simplify right side
    520,074.70x = 340,202,106,321.50
  5. Step 5: Solve for x
    x = 340,202,106,321.50/520,074.70
  6. Step 6: Final answer
    x = 654,140.85

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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.