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Finding the Fourth Proportional to 446.42, 669.36 and 215.30

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Solution

The fourth proportional to 446.42, 669.36 and 215.30 is: 322.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.42 : 669.36 = 215.30 : x
  2. Step 2: Convert to fraction form
    446.42/669.36 = 215.30/x
  3. Step 3: Cross multiply
    446.42x = 669.36 × 215.30
  4. Step 4: Simplify right side
    446.42x = 144,113.21
  5. Step 5: Solve for x
    x = 144,113.21/446.42
  6. Step 6: Final answer
    x = 322.82

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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.