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Finding the Fourth Proportional to 300.64, 450.88 and 215.04

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Solution

The fourth proportional to 300.64, 450.88 and 215.04 is: 322.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.64 : 450.88 = 215.04 : x
  2. Step 2: Convert to fraction form
    300.64/450.88 = 215.04/x
  3. Step 3: Cross multiply
    300.64x = 450.88 × 215.04
  4. Step 4: Simplify right side
    300.64x = 96,957.24
  5. Step 5: Solve for x
    x = 96,957.24/300.64
  6. Step 6: Final answer
    x = 322.50

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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.