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Finding the Fourth Proportional to 445.71, 615.39 and 298.77

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Solution

The fourth proportional to 445.71, 615.39 and 298.77 is: 412.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.71 : 615.39 = 298.77 : x
  2. Step 2: Convert to fraction form
    445.71/615.39 = 298.77/x
  3. Step 3: Cross multiply
    445.71x = 615.39 × 298.77
  4. Step 4: Simplify right side
    445.71x = 183,860.07
  5. Step 5: Solve for x
    x = 183,860.07/445.71
  6. Step 6: Final answer
    x = 412.51

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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.