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Finding the Fourth Proportional to 298.47, 447.71 and 291.64

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Solution

The fourth proportional to 298.47, 447.71 and 291.64 is: 437.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.47 : 447.71 = 291.64 : x
  2. Step 2: Convert to fraction form
    298.47/447.71 = 291.64/x
  3. Step 3: Cross multiply
    298.47x = 447.71 × 291.64
  4. Step 4: Simplify right side
    298.47x = 130,571.43
  5. Step 5: Solve for x
    x = 130,571.43/298.47
  6. Step 6: Final answer
    x = 437.46

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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.