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Finding the Fourth Proportional to 298.93, 447.70 and 290.74

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Solution

The fourth proportional to 298.93, 447.70 and 290.74 is: 435.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.93 : 447.70 = 290.74 : x
  2. Step 2: Convert to fraction form
    298.93/447.70 = 290.74/x
  3. Step 3: Cross multiply
    298.93x = 447.70 × 290.74
  4. Step 4: Simplify right side
    298.93x = 130,164.30
  5. Step 5: Solve for x
    x = 130,164.30/298.93
  6. Step 6: Final answer
    x = 435.43

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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.