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Finding the Fourth Proportional to 318.74, 474.82 and 298.82

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Solution

The fourth proportional to 318.74, 474.82 and 298.82 is: 445.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.74 : 474.82 = 298.82 : x
  2. Step 2: Convert to fraction form
    318.74/474.82 = 298.82/x
  3. Step 3: Cross multiply
    318.74x = 474.82 × 298.82
  4. Step 4: Simplify right side
    318.74x = 141,885.71
  5. Step 5: Solve for x
    x = 141,885.71/318.74
  6. Step 6: Final answer
    x = 445.15

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.