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Finding the Fourth Proportional to 330.65, 455.99 and 284.01

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Solution

The fourth proportional to 330.65, 455.99 and 284.01 is: 391.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.65 : 455.99 = 284.01 : x
  2. Step 2: Convert to fraction form
    330.65/455.99 = 284.01/x
  3. Step 3: Cross multiply
    330.65x = 455.99 × 284.01
  4. Step 4: Simplify right side
    330.65x = 129,505.72
  5. Step 5: Solve for x
    x = 129,505.72/330.65
  6. Step 6: Final answer
    x = 391.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.