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Finding the Fourth Proportional to 443,399.80, 665,099.70 and 303,431.80

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Solution

The fourth proportional to 443,399.80, 665,099.70 and 303,431.80 is: 455,147.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,399.80 : 665,099.70 = 303,431.80 : x
  2. Step 2: Convert to fraction form
    443,399.80/665,099.70 = 303,431.80/x
  3. Step 3: Cross multiply
    443,399.80x = 665,099.70 × 303,431.80
  4. Step 4: Simplify right side
    443,399.80x = 201,812,399,150.46
  5. Step 5: Solve for x
    x = 201,812,399,150.46/443,399.80
  6. Step 6: Final answer
    x = 455,147.70

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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.