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Finding the Fourth Proportional to 512,999.70, 769,499.55 and 498,237.45

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Solution

The fourth proportional to 512,999.70, 769,499.55 and 498,237.45 is: 747,356.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,999.70 : 769,499.55 = 498,237.45 : x
  2. Step 2: Convert to fraction form
    512,999.70/769,499.55 = 498,237.45/x
  3. Step 3: Cross multiply
    512,999.70x = 769,499.55 × 498,237.45
  4. Step 4: Simplify right side
    512,999.70x = 383,393,493,568.15
  5. Step 5: Solve for x
    x = 383,393,493,568.15/512,999.70
  6. Step 6: Final answer
    x = 747,356.18

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Similar ratio
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1.5x scale

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.