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Finding the Fourth Proportional to 446.66, 615.63 and 306.53

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Solution

The fourth proportional to 446.66, 615.63 and 306.53 is: 422.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.66 : 615.63 = 306.53 : x
  2. Step 2: Convert to fraction form
    446.66/615.63 = 306.53/x
  3. Step 3: Cross multiply
    446.66x = 615.63 × 306.53
  4. Step 4: Simplify right side
    446.66x = 188,710.60
  5. Step 5: Solve for x
    x = 188,710.60/446.66
  6. Step 6: Final answer
    x = 422.49

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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.