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Finding the Fourth Proportional to 443,786.80, 665,291.40 and 266,105.20

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Solution

The fourth proportional to 443,786.80, 665,291.40 and 266,105.20 is: 398,924.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,786.80 : 665,291.40 = 266,105.20 : x
  2. Step 2: Convert to fraction form
    443,786.80/665,291.40 = 266,105.20/x
  3. Step 3: Cross multiply
    443,786.80x = 665,291.40 × 266,105.20
  4. Step 4: Simplify right side
    443,786.80x = 177,037,501,055.28
  5. Step 5: Solve for x
    x = 177,037,501,055.28/443,786.80
  6. Step 6: Final answer
    x = 398,924.67

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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.