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Finding the Fourth Proportional to 443.34, 665.01 and 280.53

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Solution

The fourth proportional to 443.34, 665.01 and 280.53 is: 420.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    443.34 : 665.01 = 280.53 : x
  2. Step 2: Convert to fraction form
    443.34/665.01 = 280.53/x
  3. Step 3: Cross multiply
    443.34x = 665.01 × 280.53
  4. Step 4: Simplify right side
    443.34x = 186,555.26
  5. Step 5: Solve for x
    x = 186,555.26/443.34
  6. Step 6: Final answer
    x = 420.80

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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.