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Finding the Fourth Proportional to 446.02, 615.20 and 305.89

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Solution

The fourth proportional to 446.02, 615.20 and 305.89 is: 421.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.02 : 615.20 = 305.89 : x
  2. Step 2: Convert to fraction form
    446.02/615.20 = 305.89/x
  3. Step 3: Cross multiply
    446.02x = 615.20 × 305.89
  4. Step 4: Simplify right side
    446.02x = 188,180.46
  5. Step 5: Solve for x
    x = 188,180.46/446.02
  6. Step 6: Final answer
    x = 421.91

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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.