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Finding the Fourth Proportional to 512,999.80, 769,499.70 and 455,919.10

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Solution

The fourth proportional to 512,999.80, 769,499.70 and 455,919.10 is: 683,878.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,999.80 : 769,499.70 = 455,919.10 : x
  2. Step 2: Convert to fraction form
    512,999.80/769,499.70 = 455,919.10/x
  3. Step 3: Cross multiply
    512,999.80x = 769,499.70 × 455,919.10
  4. Step 4: Simplify right side
    512,999.80x = 350,829,610,674.27
  5. Step 5: Solve for x
    x = 350,829,610,674.27/512,999.80
  6. Step 6: Final answer
    x = 683,878.65

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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.