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Finding the Fourth Proportional to 445.74, 615.36 and 298.62

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Solution

The fourth proportional to 445.74, 615.36 and 298.62 is: 412.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.74 : 615.36 = 298.62 : x
  2. Step 2: Convert to fraction form
    445.74/615.36 = 298.62/x
  3. Step 3: Cross multiply
    445.74x = 615.36 × 298.62
  4. Step 4: Simplify right side
    445.74x = 183,758.80
  5. Step 5: Solve for x
    x = 183,758.80/445.74
  6. Step 6: Final answer
    x = 412.26

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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.