Home / 985,391.70-1,478,136.15-512,999.70

Finding the Fourth Proportional to 985,391.70, 1,478,136.15 and 512,999.70

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Solution

The fourth proportional to 985,391.70, 1,478,136.15 and 512,999.70 is: 769,524.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,391.70 : 1,478,136.15 = 512,999.70 : x
  2. Step 2: Convert to fraction form
    985,391.70/1,478,136.15 = 512,999.70/x
  3. Step 3: Cross multiply
    985,391.70x = 1,478,136.15 × 512,999.70
  4. Step 4: Simplify right side
    985,391.70x = 758,283,401,509.16
  5. Step 5: Solve for x
    x = 758,283,401,509.16/985,391.70
  6. Step 6: Final answer
    x = 769,524.85

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Double scale
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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.