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Finding the Fourth Proportional to 315.43, 469.95 and 299.94

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Solution

The fourth proportional to 315.43, 469.95 and 299.94 is: 446.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.43 : 469.95 = 299.94 : x
  2. Step 2: Convert to fraction form
    315.43/469.95 = 299.94/x
  3. Step 3: Cross multiply
    315.43x = 469.95 × 299.94
  4. Step 4: Simplify right side
    315.43x = 140,956.80
  5. Step 5: Solve for x
    x = 140,956.80/315.43
  6. Step 6: Final answer
    x = 446.87

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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.